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For the Inventor, By the Inventor

Tokyo, Japan

Daicel Polymer Ltd.

Calculating rank
USPTO Granted Patents = 24

% Expired Patents = 12.5


Trademarks = 1

Forward Citations = 27

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31 inventors (with patents filed for the assignee):

goldMedal Masahiko Itakura (6 out of 9 patents)

silverMedal Toshio Oguni (3 out of 3 patents)

bronzeMedal Shinichiro Imanishi (3 out of 7 patents)

4.  Yasuo Okumura (3 out of 3 patents)

5.  Daiji Ikeda (3 out of 7 patents)

6.  Yoshihiro Asami (3 out of 3 patents)

7.  Toshihiro Tai (3 out of 4 patents)

8.  Hiroshi Katayama (3 out of 47 patents)

9.  Takayuki Uno (2 out of 6 patents)

10.  Kazunobu Yanai (2 out of 2 patents)

11.  Masahiro Katayama (2 out of 3 patents)

12.  Takafumi Ueda (2 out of 13 patents)

13.  Naoki Wakita (2 out of 6 patents)

14.  Hiroshi Sagane (2 out of 2 patents)

15.  Hirotomo Katano (2 out of 2 patents)


24 patents:

1. 12122900 - Electromagnetic wave shielding molded article (2024-10-22),
2. 11590608 - Sealing method (2023-02-28),
3. 11515644 - Electromagnetic wave shielding and absorbing molded article (2022-11-29),
4. 11472068 - Thermoplastic resin composition for cleaning molding processing machine (2022-10-18),
5. 11338475 - Fiber-reinforced resin composition (2022-05-24),
6. 11274187 - Cellulose ester composition (2022-03-15),
7. 11267171 - Method of manufacturing composite molded body (2022-03-08),
8. 11167376 - Method for roughening metal molded body surface (2021-11-09),
9. 10703019 - Resin-impregnated fiber bundle, compression molded article, and a method for producing the same (2020-07-07),
10. 10615508 - Thermoplastic resin composition for molded article having capability of shielding millimeter waves (2020-04-07),
11. 10494503 - Cellulose ester composition (2019-12-03),
12. 10434741 - Composite molded article (2019-10-08),
13. 10322535 - Method of manufacturing composite molded body (2019-06-18),
14. 9920285 - Thermoplastic resin composition for cleaning molding processing machine (2018-03-20),
15. 9505924 - ABS resin composition (2016-11-29),
Company Overview
Daicel Polymer Ltd., based in Tokyo, specializes in the development and manufacturing of advanced polymer materials. The company focuses on innovative solutions for various industries, including automotive, electronics, and packaging. With a strong emphasis on research and technology, Daicel Polymer is dedicated to enhancing material performance and sustainability. Its expertise in polymer science positions it as a key player in the global market, contributing to advancements in material applications and environmental responsibility.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

Daicel Polymer Ltd. USPTO Patent Assignee Logo
24 Patents

#1,215 in

#2,636 in

#26,701 in the World

Tokyo, JP
Tokyo, Japan

Daicel Polymer Ltd.

Forward Citations = 27

31 inventors:

goldMedal Masahiko Itakura (6 out of 9 patents)

silverMedal Toshio Oguni (3 out of 3 patents)

bronzeMedal Shinichiro Imanishi (3 out of 7 patents)

4.  Yasuo Okumura (3 out of 3 patents)

5.  Daiji Ikeda (3 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Daicel Polymer Ltd.. Retrieved from https://idiyas.com/company/daicel-polymer

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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