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For the Inventor, By the Inventor

Aichi, Japan

Yoshishige Shimizu

This inventor holds 4 USPTO granted patents. Top assignees: Mitsubishi Rayon Company, Limited, Chemitech, Inc.. Active years: 1987-2005.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshishige Shimizu. Retrieved from https://idiyas.com/inventor/yoshishige-shimizu

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

USPTO Granted Patents = 4

% Patents Active = 100.0

Average Co-Inventor Count = 3.9

ph-index = 2

Forward Citations = 46(Granted Patents)


Location History:

  • Toyohashi, JP (1987 - 2005)
  • Aichi, JP (2005)

Company Filing History:

goldMedal4 out of 1,357 
 
Mitsubishi Rayon Company, Limited
 patents
silverMedal1 out of 5 
 
Chemitech, Inc.
 patents
where one patent can have more than one assignee

Years Active: 1987-2005

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4 patents (USPTO):Explore Patents
1. 6924032 - Flame retarding polypropylene fiber and production method thereof and flame retarding polypropylene film (2005-08-02),
2. 6921504 - Process of making flame retarding polypropylene fiber (2005-07-26),
3. 6162539 - High luminance luminous fiber and process for producing the same (2000-12-19),
4. 4713291 - Fragrant fiber (1987-12-15),

Title: Innovations by Yoshishige Shimizu

Introduction

Yoshishige Shimizu is a notable inventor based in Aichi, Japan. He has made significant contributions to the field of materials science, particularly in the development of flame-retardant polypropylene products. With a total of 4 patents to his name, Shimizu's work focuses on enhancing the safety and performance of polypropylene fibers and films.

Latest Patents

Shimizu's latest patents include a flame-retarding polypropylene fiber and a flame-retarding polypropylene film. These innovations are designed to provide both excellent flame retardancy and superior strength, while also ensuring that no toxic gases are generated during use. The production method involves mixing 0.5 to 3.0% by weight of a NOR type hindered amine-based stabilizer and 0.5 to 3.0% by weight of a phosphoric ester-based flame retardant with a polypropylene resin. The mixture is then spun to form an unstretched yarn, which is subsequently stretched and thermally set to achieve the desired properties.

Career Highlights

Throughout his career, Yoshishige Shimizu has worked with prominent companies such as Mitsubishi Rayon Company, Limited and Chemitech, Inc. His experience in these organizations has allowed him to refine his expertise in polymer science and contribute to innovative solutions in the industry.

Collaborations

Shimizu has collaborated with notable colleagues, including Hideo Sakakura and Hiroshi Yamamoto. These partnerships have facilitated the exchange of ideas and advancements in the field of flame-retardant materials.

Conclusion

Yoshishige Shimizu's contributions to the development of flame-retardant polypropylene products highlight his innovative spirit and dedication to safety in materials science. His patents reflect a commitment to creating effective solutions that meet industry needs.

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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