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Minato-ku, Japan

Aronkasei Co., Ltd.

USPTO Granted Patents = 9

EPO Patents = 6

Trademarks = 3

Forward Citations = 93

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30 inventors (with patents filed for the assignee):

Tadashi Hasegawa (3 out of 4 patents)

Noriaki Date (2 out of 2 patents)

Kazuhide Hattori (2 out of 10 patents)

4. Hiroyuki Yamaji (2 out of 2 patents)

5. Yoshikazu Hatakeyama (2 out of 2 patents)

6. Yoshiyuki Shida (2 out of 2 patents)

7. Takumi Kitaoka (2 out of 2 patents)

8. Takashi Kohama (2 out of 2 patents)

9. Shinichi Nakamura (2 out of 2 patents)

10. Shigemi Kushida (2 out of 2 patents)

11. Yoshimitsu Tabata (2 out of 2 patents)

12. Madoka Furuta (1 out of 1 patent)

13. Masanori Shiraki (1 out of 1 patent)

14. Yasujuki Agari (1 out of 1 patent)

15. Ryozo Morita (1 out of 6 patents)

9 patents: Sort by Forward Citations

1. 9175159 - Thermoplastic elastomer composition (2015-11-03),

2. 8871835 - Heat conductive elastomer composition (2014-10-28),

3. 8658727 - Elastomer composition and stopper for medical container (2014-02-25),

4. 5811136 - Screw-in-plunger injection apparatus (1998-09-22),

5. 5804230 - Injection molding machine (1998-09-08),

6. 5665285 - Method for producing a molded foam article with an integral skin (1997-09-09),

7. 5366674 - Process for producing expanded plastics with skin (1994-11-22),

8. 4585686 - Two-layer structure molded by using thermoplastic resin (1986-04-29),

9. 4381727 - Sealing agent injecting machine (1983-05-03),

Aronkasei Co., Ltd. is a leading manufacturer and distributor of industrial chemicals, specializing in the production of high-quality plastic additives and specialty chemicals. With a strong focus on innovation and sustainability, Aronkasei has been at the forefront of the chemical industry for over 50 years. Our diverse product portfolio includes antioxidants, UV stabilizers, flame retardants, and more, catering to a wide range of industries such as automotive, electronics, and packaging. We pride ourselves on delivering superior products and personalized service to our customers worldwide.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 2 2025

9 Patents

#14 in Minato-ku

#4,572 in Japan

Minato-ku, Japan

Aronkasei Co., Ltd.

Forward Citations = 93

30 inventors:

Tadashi Hasegawa (3 out of 4 patents)

Noriaki Date (2 out of 2 patents)

Kazuhide Hattori (2 out of 10 patents)

4. Hiroyuki Yamaji (2 out of 2 patents)

5. Yoshikazu Hatakeyama (2 out of 2 patents)

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