African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6848

Full Length Research Paper

Review of patents on life cycle assessment

Lidiana Zocche
  • Lidiana Zocche
  • Department of Production Engineering, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre-RS, Brazil.
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Luan Carlos Santos Silva
  • Luan Carlos Santos Silva
  • Department of Production Engineering, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre-RS, Brazil.
  • Google Scholar
Cassiano Moro Piekarski
  • Cassiano Moro Piekarski
  • Department of Production Engineering, Federal University of Technology - Parana (UTFPR), Ponta Grossa-PR, Brazil.
  • Google Scholar
Antonio Carlos de Francisco
  • Antonio Carlos de Francisco
  • Department of Production Engineering, Federal University of Technology - Parana (UTFPR), Ponta Grossa-PR, Brazil.
  • Google Scholar

  •  Received: 30 April 2013
  •  Accepted: 22 January 2015
  •  Published: 19 February 2015


Many tools are developed and used in order to evaluate the environmental impacts in products and services. One tool that is gaining prominence is the Life Cycle Assessment (LCA), which can analyze environmental aspects and impacts along the life cycle of product. However, not much is known about the patent generation through the use of LCA. In this sense, this paper aims to investigate LCA studies that generated patents through innovation in both products and processes. To reach the proposed objective, three patents basis data were used: WIPO, INPI and EPO. Eleven different patents requested involving LCA applications were found. The LCA and innovation generation need to be more explored, expanding the vision of organizations for this issue. LCA has a great potential to improve the environmental performance of products, processes and services and, at the same time, can assist in innovations generation and in technological development through patents requests.


Key words: Life Cycle Assessment (LCA), innovation, patents.


Environmentally correct studies about the environmental performance are in evidence through awareness campaigns, and show that companies are increasingly treating and valuing environmental information combined with the life cycle of products to meet the demand of market consumers of products.
Thus, the life cycle of products has evolved in a context where demands for health and environmental requirements are raised by various stakeholders such as authorities, companies and social organizations, increasing demands for environmentally oriented products and targeting innovations through  technological changes with the lowest possible environmental impact (Tidd et al., 2005; Azapagic, 1999).
In this context, several methods are being developed to assess the environmental impacts in the life cycle of products, processes or activities for the purpose of regulation and support in business decisions. One method that is gaining prominence is the Life Cycle Assessment (LCA) which has been used as a management tool in an integrated, systematic and multidisciplinary way, quantifying environmental loads and their potential impacts along the life cycle of a product,  process  or  activity  (Pieragostini  et  al., 2012; Wonglimpiyarat, 2005).
This indication resulting from LCA and the search for improvements in the production process enables that at the same time that companies seek to improve the environmental performance of its products this can result in technological innovations for the industry. Many authors complement their studies saying that LCA is a crucial tool for companies wishing to reach results of excellence and to facilitate green innovations.[LZ1]
Therefore, according to Oliveira et al. (2010), these new technologies can be identified through the analysis of patent applications in some fields. In this context, the aim of this article was to conduct a survey of LCA studies that generated patents through innovation in both products and processes.
LCA is a technical tool of analytical approach and managerial character which contributes to the evaluation of the environmental aspects and potential impacts associated with a product or activity during its life cycle (Garraín et al., 2010; Lofgre et al., 2011; Chauhan et al., 2011; Abdallah et al., 2012).
In general terms according to Lofgren et al. (2011), the aim in relation to the use of LCA is to satisfy customers orders and simultaneously achieve an ideal balance between the product and the environment. The methodology (LCA) has developed and matured over the last decades. Current activities about databases, quality assurance, consistency and harmonization of methods contributed to this.
The LCA methodology is internationally structured and standardized by the International Organization for Standardization (ISO), belonging to the series ISO 14040 and 14044 (ISO 2006a, b). Both are considered the main and most important standards for environmental assessment based on the life cycle of product.
The methodology consists of four phases: aim definition and scope, inventory analysis, impact assessment and interpretation. The iteration between these phases can be observed in Figure 1.
The first phase of the LCA comprises the definition of the objective and scope. The goal of an LCA study should unequivocally declare the intended application, the reasons for conducting the study and target audience ISO 14040 (2009a). The scope includes the cover of the study. According to Sherwani et al. (2010), Pieragostini et al. (2012), Zhou et al. (2011) and Roy et al. (2009), the system boundaries, the functional unit and the system limits should be stated clearly in the scope of the product system to be studied.
The analysis of the inventory, the second stage of LCA, involves an extensive database of materials involved in the product or system including the surveying, the collecting and analyzing data required for LCA (Jijakli, 2012; Olsen et al., 2001; Guinée et al., 2011).The phase of impact assessment consists in studying the significance of environmental impacts from the inventory data. At the end of the impact assessment of the life cycle, the final result is an environmental profile of the product system under study, as defined in the aim and scope. These results are interpreted in the last phase of the methodological framework of life cycle assessment (Benetto and Klemes, 2009).
The last stage of evaluating the structure of the life cycle, comprises the interpretation. In this phase, the information from the inventory analysis and impact assessment system is evaluated, and conclusions in accordance with the objectives outlined in the first phase of the study are proposed (Benetto and Klemes, 2009; Jijakli, 2012; ISO 1440, 2009).
The authors Garraín et al. (2010), Lofgre et al. (2011) and Chauhan et al. (2011) add that life cycle analysis is a technical tool with analytical approach and managerial character, which contributes to the evaluation of the environmental aspects and potential impacts, associated with a product or activity during its life cycle, through the obtained data.
Life cycle assessment (LCA) as a tool for generating innovation
Nowadays, there is a strong pressure to innovate around the world. The innovation has been regarded by researchers as a strategic issue, a key for business success in an increasingly competitive environment as a result of intense technological development and the expectation of new products by consumers. This leads the companies to the need for constantly innovate.
According to Cramer and Tukker (2006), environmental demands are largely focused on innovation through adaptation of processes, products and services due to the regulations, considering that the best results are expected in relation to environmental aspects, at lower costs, thereby extending the range of answers to all stages of the life cycle.
For the process of technological innovation in organizations which results in sustainable products and processes, Figueirêdo et al. (2010) emphasizes that the availability and use of methodological tools which facilitate the consideration of environmental issues in every stage of this process is necessary.
In parallel with this, many methods are being developed to assess the environmental impacts of products for regulation and support in business decisions about the product improvement generating innovations (Krozer, 2008; Guziana, 2011). In this sense, one tool that is gaining prominence is the Life Cycle Assessment (LCA), which can provide fundamental technological shifts in production and in life cycle of products and services.
The LCA allows obtaining knowledge of the life cycle of the product as a whole, covering all stages of the product development process, including inputs and outputs in each process step. This makes possible to identify the unfavorable points of the product related to environmental aspects. Thus, the search for alternatives to improve the environmental performance of this product may result in innovations to the industry (ISO, 2009a; Lofgren et al., 2011).
According to Demuner et al. (2011) and Moen and Jorgensen (2010), the competitiveness of a company is related to its ability to research and implement innovative opportunities. Chiou et al. (2011), Tseng (2010) and Yung et al. (2011) reinforce that LCA is, in general, an innovative tool for industries.
The operationalization of the production system allied the innovations, which aim to meet the dimensions of sustainability and are considered imminent trends for organizations that want to remain competitive and consolidate good results. On this aspect, Luz (2011) states in his study, which evaluates the contribution of indicators obtained from the analysis of the life cycle on the generation of innovation in the industry, that the use of LCA may result in innovations and consequently improving competitiveness.
Corroborating with this thought, Kemp et al. (1999), Chiou et al. (2011), Tseng (2010) and Yung et al. (2011) emphasize that LCA is presented as a tool for assessing the environmental impact, able to recognize the multifaceted nature of environmental innovation; promoting improvements composed by the product innovation, process innovation and innovation in services. With the purposes of reducing the negative impacts and risks to the environment.
In this aspect, Madival et al. (2009), Rousset et al. (2011), Rodríguez et al. (2011), Li et al. (2010) and Abdallah et al. (2012) highlight the concerning of the LCA application in industry in which it is possible to observe the generation of technological changes both in product, process and service. These innovations may result in patents through the use of this methodology.
Study of patents related to LCA
A patent is an exclusive right granted for an invention, which is a product or a process that provides, in general, a new way of doing something, or offers a new technical solution to a problem (WIPO, 2013).
The patents provide incentives to individuals by offering them recognition for their creativity and material reward for their marketable inventions. These incentives encourage innovation, which assures that the quality of human life is continuously enhanced.
According to the World Intellectual Property Organization (WIPO), the number of patent applications has grown around 1.5 million each year, resulting in more than 500.000 patents granted. Companies  in  the  United States, Japan and Europe are increasingly using this instrument as strategic input.




In order to verify if LCA studies generate patents through its innovations, a research at the patents basis “WIPO” - Word Intellectual Property Organization was carried out. The option to use the WIPO was due to the fact that it is a broad tool of patents research, whose mission is to promote innovation and creativity for economic, social and cultural development of all countries through a balanced and effective intellectual (patents, copyrights, trademarks, designs, etc.) international property. Searches were also conducted at INPI - National Institute of Industrial Property (INPI), which is responsible for the improvement, dissemination and management of the Brazilian system of granting and guarantee of intellectual property rights for industry and EPO - European Patents Office, which contains all information publicly available on European patent applications. The study was conducted in March 2013 and the keyword searched was "life cycle assessment (LCA)."
This analysis involved the acquisition of information, such as the nationality of the applicant, the nature of the application, the priority date and associated international patent classifications, as well as the title of technology. This research aimed to map the information protected in Brazil and consequently analyzing its importance on a global scale.



Among the three basis of patents surveyed only at the base, WIPO eleven patent requests related to the topic ACV were found. The first patent request occurred in 2001 in Japan, with the title: "Method for using a feature analysis of two-dimensional energy sources expressed by an influence of the life cycle of the environment and life cycle and costs of a system", whose aim was to provide information about the influences of energy sources in an environment, through analyzing the influence of environmental life cycle costs and life cycle through the LCA.
In the following year, Japan entered with two new patent requests: "Evaluation system of environmental effects of products and services"; a system that is able to objectively evaluate the recycling which is susceptible to subjectivity in an LCA, and to show quantitatively the total environmental load from products and services. The other patent application, "Process Evaluation System", aims to calculate and assess the value of environmental load of the production process based on the content of the production process and Life Cycle Assessment - LCA, through CAD and CAM system. The application was required by Fuji Electric Co Ltd. The same company has filled its second patent application in 2005, "Life Cycle Evaluation System"; this system aims to quickly modify the design in order to make the life cycle longer through the CAD system and LCA.
Later in 2005, Japan held two more patent applications: "Water in oil, aerosol type product", in order to provide an emulsion that is preferable from the point  of  view  of  life cycle assessment (LCA), required by the company Daizo: KK and "System and Method for Evaluation of the Life Cycle" which allows provision of an LCA system capable of simultaneously evaluating the environmental impact of the life cycle of the product and energy consumption of the facilities, referring to the company Hitachi Ltd.
The Republic of Korea requested this year, its first patent application: "Method for assessment of the integration for eco-design of an automobile through an integrated index, including recycling". This method evaluates the recycling (via LCA data and disassembly) of the automobile, and analyzes a weak point in order to increase the recycling of a design step from a concept of concurrent engineering, as the Hyundai Motor Company conducted the application.
In 2007, the company Nippon Oil Corp., installed in Japan, held the patent application: "Method for production of hydrogen to produce reformed gasoline and for production of aromatic hydrocarbons" aiming to provide a method to produce hydrogen, sufficiently effective to reduce LCA CO2.
In 2009, the company Hitachi Ltd., made its second patent application: "System support to the project", in which an environmental assessment and system design support are provided and a database is obtained by the Association of Product Classification Information, in order to solve some problems of LCA methodology.
In 2010, the first patent application was required via PCT (Cooperation Treaty Patent) comprising a multilateral treaty which allows requirement of patent protection for an invention simultaneously in many countries through the filling of a single international patent application. In this sense, the patent entitled "System support for the project through sustainable project" aims to create an environment of social participation based on integrated software with the design of sustainable products and tools from LCA and processes.
In 2012, the Republic of Korea held its second patent application, by the Research Foundation and Business Sungkyunkwan University, called: "Method for the use of a feature of two-dimensional energy sources analysis expressed by an influence of the environment life cycle and the costs of a system life cycle", capable of providing information about the influences of energy sources in an environment, analyzing the influence through the environmental life cycle and life cycle costs through the LCA.
Table 1 illustrates the information described above, relating the year, the patent classification, the applicant company and the country. According to the INPI - National Institute for Intellectual Property, the patents have different classifications. Hereafter the classification of patent applications found are described:


- The class G06F covers equipment or methods of digital computing or data processing, specially adapted for specific applications;
- The class G06Q comprises systems or data processing methods, specially adapted for administrative, commercial, financial, management, supervision or prediction purposes; systems or methods specially adapted for administrative, commercial, financial, management, supervision or prediction purposes,
not otherwise provided for;
- The class G05B comprises the control and regulation. This class includes methods, systems, and devices for control in general;
- The class C01B includes nonmetallic elements and their compounds;
- The class B65D covers containers for storage or
transport of articles or materials.
Japan stands out among the patent applications analyzed in this study, due to the rate of technological development and research of the country. Thus, Japan has demonstrated its concern for sustainability, seeking innovation through ways that enable and feature the minimization of environmental impacts caused by developed products, processes and services.




Moreover, Demuner et al. (2011) justifies a strong interest of Japanese companies to   invest   and develop its own technology. Sánchez et al. (2011) provided evidence that the best performing companies have an innovative behavior. Following Japan is the United States of America especially by applying for a patent via PCT and lastly is the Republic of Korea.
Among the pending applications for patents, only one is linked to a university. The industries represent the remainder of patent applications belonging to different sectors: automotive, electronics, energy, software, petrochemicals, gas and coal. These industries seek the commitment to innovation and environmental sustainability.
Figure 2 illustrates the relationship of the countries with the number of patent applications, highlighting the patents ratings required by Japan. As highlighted in Figure 2, the largest number of patent applications is represented in Japan whose focus is information technology applications related to software integrated with the design of sustainable products through LCA tools and systems support projects.


The Graph 1 illustrates the amount of patent applications between 2001 and 2013. You can see that the first application for patent related LCA occurred in 2001, with a significant increase by the year 2005, which had the highest number of patent applications. This year there was a decline in the requests, returning to growth only in 2013.




This article was developed with the intention of checking LCA studies which enabled the generation of innovations through patents generated by the application of this methodology.
It was noticed that the LCA has great potential to assist in the generation of innovation and patents, but this issue needs to be explored further, expanding the vision of organizations for that matter, since, in a study of LCA, there are generated indicators that enable a vision system as a whole; generating information which can be used to guide the actions and decisions of the companies.
To enable us evaluate the implementation of generation of innovation in order to promote significant improvements aiming to enhance or reduce its impact in the environment and still be useful for the strategic planning of the company allowing the identification of innovation opportunities that had not yet been exploited.
Therefore, companies should incorporate monitoring systems and signs of change through LCA studies. Where, at the same time as they seek to produce in sustainable way, companies can use the LCA strategically and become more competitive and innovative in the market


The authors have not declared any conflict of interest


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