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Polymer Processing Research Institute Ltd.

USPTO Granted Patents = 33

Forward Citations = 576

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39 inventors (with patents filed for the assignee):

Kazuhiko Kurihara (26 out of 45 patents)

Hiroshi Yazawa (17 out of 34 patents)

Haruhisa Tani (16 out of 16 patents)

4. Masahide Yazawa (10 out of 10 patents)

5. Yasuo Sasaki (6 out of 43 patents)

6. Tokio Okada (6 out of 7 patents)

7. Shigezo Kojima (6 out of 6 patents)

8. Yuki Kuroiwa (4 out of 12 patents)

9. Seizo Kobayashi (4 out of 16 patents)

10. Yoshimu Iwanami (4 out of 10 patents)

11. Setsuya Tsuyama (4 out of 4 patents)

12. Hirosi Yazawa (4 out of 4 patents)

13. Toshikazu Ohishi (3 out of 7 patents)

14. Sumio Yoshida (3 out of 4 patents)

15. Masaki Matsumoto (3 out of 3 patents)

Core Competencies:

Transverse Alignment

Non-Woven Fabric

Thermoplastic Polymer

Filament Production

Cross-Laminated Fabrics

High-Strength Materials

Stretching Techniques

Web Manufacturing

Polyethylene

Thermotropic Liquid Crystal

Reinforced Fabrics

Centrifugal Filament Collection

33 patents: Sort by Forward Citations

1. 6984350 - Method of and apparatus for manufacturing a web having filaments aligned in a transverse direction (2006-01-10),

2. 6877971 - Apparatus for producing a transversely aligned web in which filaments spun at high rate are aligned in the transverse direction (2005-04-12),

3. 6605553 - Tow multiaxial non-woven fabric (2003-08-12),

4. 6207273 - Process for producing filament and filament assembly composed of thermotropic liquid crystal polymer (2001-03-27),

5. 5723388 - Prepreg of ultra-high-molecular-weight polyethylene (1998-03-03),

6. 5702657 - Method for the continuous production of a polyethylene material having (1997-12-30),

7. 5612125 - Process for producing prepreg (1997-03-18),

8. 5578373 - Split polyethylene stretched material and process for producing the same (1996-11-26),

9. 5382773 - Apparatus and method for fabricating a perforated web by light (1995-01-17),

10. 5338593 - Multiaxial nonwoven fabric (1994-08-16),

11. 5308424 - Multiaxial nonwoven fabric, and method of making the same (1994-05-03),

12. 5300166 - Apparatus for manufacturing a web and method (1994-04-05),

13. 5259097 - Stretching machine (1993-11-09),

14. 5232533 - Method for heat-setting cross-laminated non-woven fabrics (1993-08-03),

15. 5106555 - Process for the continuous production of high-strength and high-modulus (1992-04-21),

Company Overview

Polymer Processing Research Institute Ltd. is a Tokyo-based organization specializing in advanced polymer processing technologies. The institute focuses on research and development in the fields of polymer materials and their applications, aiming to innovate and enhance manufacturing processes. By leveraging cutting-edge techniques, the organization contributes to various industries, including automotive, electronics, and packaging, fostering advancements in material performance and sustainability.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

33 Patents

#1,021 in Tokyo

#2,201 in Japan

#20,147 in the World

Polymer Processing Research Institute Ltd.

Forward Citations = 576

39 inventors:

Kazuhiko Kurihara (26 out of 45 patents)

Hiroshi Yazawa (17 out of 34 patents)

Haruhisa Tani (16 out of 16 patents)

4. Masahide Yazawa (10 out of 10 patents)

5. Yasuo Sasaki (6 out of 43 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Polymer Processing Research Institute Ltd.. Retrieved from https://idiyas.com/company/polymer-processing-research-institute

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

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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