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For the Inventor, By the Inventor

Tokyo, Japan

Prime Polymer Co., Ltd.


USPTO Granted Patents = 51



Trademarks = 1

Forward Citations = 75

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116 inventors (with patents filed for the assignee):

goldMedal Keita Itakura (7 out of 13 patents)

silverMedal Satoshi Tamura (7 out of 15 patents)

bronzeMedal Ryoichi Tsunori (5 out of 12 patents)

4.  Minoru Sugawara (5 out of 13 patents)

5.  Tatsuji Kawamura (4 out of 5 patents)

6.  Hirofumi Goda (4 out of 4 patents)

7.  Katsutoshi Ohta (3 out of 3 patents)

8.  Rikuo Onishi (3 out of 5 patents)

9.  Satoshi Hashizume (3 out of 4 patents)

10.  Jun Birukawa (3 out of 3 patents)

11.  Toru Iwashita (3 out of 3 patents)

12.  Yoshio Sugimoto (3 out of 5 patents)

13.  Yasuhiko Otsuki (3 out of 3 patents)

14.  Tomoyuki Obara (3 out of 8 patents)

15.  Ikunori Sakai (3 out of 21 patents)


Core Competencies:
Polypropylene Film
Propylene Polymer Composition
Biaxially-Stretched Film
Fiber-Reinforced Resin
Capacitor Film
Microporous Membrane
Injection Molding
Blow Molding
Carbon Fiber-Reinforced Resin
Thermal Sterilization Packaging
Automotive Parts
Expansion Injection Molding

51 patents:

1. 12384908 - Multilayer polypropylene film for capacitor (2025-08-12),
2. 12344731 - Propylene polymer composition and shaped article (2025-07-01),
3. 12202233 - Laminates and liquid packaging bags (2025-01-21),
4. 11873392 - Polypropylene-based resin composition (2024-01-16),
5. 11434356 - Propylene-based resin composition (2022-09-06),
6. 11359082 - Polypropylene-based resin composition and molded article (2022-06-14),
7. 11292899 - Propylene-based polymer, method for producing the same, propylene-based resin composition and molded article (2022-04-05),
8. 11020885 - Polypropylene-based foamed molded body and manufacturing method of polypropylene-based foamed molded body (2021-06-01),
9. 10858507 - Fiber-reinforced polypropylene-based resin composition and molded product thereof (2020-12-08),
10. 10800909 - Propylene homopolymer composition for capacitor film, method for producing the same, and capacitor film (2020-10-13),
11. 10793708 - Propylene homopolymer composition for capacitor film, method for producing the same, and capacitor film (2020-10-06),
12. 10619039 - Polypropylene resin composition and use thereof (2020-04-14),
13. 10457786 - Biaxially-stretched film and ethylene polymer composition (2019-10-29),
14. 10370465 - Propylene homopolymer for stress-resistant molded article, composition containing the polymer, and stress-resistant molded articles obtained therefrom (2019-08-06),
15. 10256041 - Polypropylene for film capacitor, biaxially stretched film for film capacitor, film capacitor, and process for producing the same (2019-04-09),
Prime Polymer Co., Ltd. is a leading manufacturer of polyolefin products based in Japan. With a strong focus on innovation and sustainability, the company produces high-quality polymers and resin materials that cater to various industries including automotive, packaging, electronics, and construction. Prime Polymer Co., Ltd. strives to meet the evolving needs of its customers by continuously developing advanced solutions and technologies. For more information, please visit their website.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

51 Patents

#692 in Tokyo

#1,651 in Japan

#13,381 in the World

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Tokyo, Japan

Prime Polymer Co., Ltd.

Forward Citations = 75

116 inventors:

goldMedal Keita Itakura (7 out of 13 patents)

silverMedal Satoshi Tamura (7 out of 15 patents)

bronzeMedal Ryoichi Tsunori (5 out of 12 patents)

4.  Minoru Sugawara (5 out of 13 patents)

5.  Tatsuji Kawamura (4 out of 5 patents)

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