Kanagawa, Japan

Yoichi Kawai

This inventor holds 23 USPTO granted patents, primarily in Polypropylene Compositions. Top assignees: Mitsui Toatsu Chemicals, Incorporated, Daiwa Co., Ltd., Mitsui Chemicals, Inc.. Active years: 1982-2000.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoichi Kawai. Retrieved from https://idiyas.com/inventor/yoichi-kawai

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile


% Patents Active = 100.0

Average Co-Inventor Count = 4.6

ph-index = 10

Forward Citations = 348(Granted Patents)


Location History:

  • Yokohama, JP (1982 - 1997)
  • Kanagawa, JP (1987 - 2000)

Company Filing History:


Years Active: 1982-2000

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Areas of Expertise:
Polypropylene Resin
Polypropylene Fiber
Polyolefin Composition
Dielectric Strength
Glass-Fiber Reinforced
Inorganic Filler
Electrically-Conductive
Molded Products
Preparation Process
Vehicle Exterior
Resin Composition
23 patents (USPTO):Explore Patents

Title: Innovations and Contributions of Yoichi Kawai in Polypropylene Technology

Introduction: Yoichi Kawai is an esteemed inventor based in Kanagawa, Japan, known for his significant contributions to the field of polypropylene technology. With an impressive portfolio of 23 patents, Kawai's work has advanced the capabilities and applications of polypropylene resin compositions and fibers.

Latest Patents: Among his latest innovations, Kawai developed a polypropylene resin composition and method for coating molded products. This composition includes a combination of polypropylene and an ethylene-propylene-diene terpolymeric rubber, providing excellent bond strength to coated films. The detailed steps of his coating methods focus on applying primer coatings or utilizing plasma irradiation for enhanced adhesion. Additionally, Kawai has devised a process for making polypropylene fibers characterized by their strength and versatility, utilizing specific polypropylene compositions to improve extrudability and stretching conditions.

Career Highlights: Kawai's career is marked by his tenure at notable companies such as Mitsui Toatsu Chemicals, Incorporated and Nippon Petrochemicals Company, Limited. His experience in these leading organizations has not only honed his expertise in polymer science but also facilitated the development of cutting-edge technologies that have influenced the industry.

Collaborations: Throughout his career, Kawai has collaborated with distinguished professionals like Katsumi Sekiguchi and Masaru Abe. These partnerships have been instrumental in driving innovative projects and furthering research in polypropylene applications.

Conclusion: Yoichi Kawai’s pioneering work in polypropylene technology exemplifies the impact of dedicated inventors on the industrial landscape. His patents continue to serve as a foundation for advancements in materials science, showcasing the importance of innovation in meeting contemporary manufacturing challenges.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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