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Mitsui Toatsu Chemicals, Incorporated

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USPTO Granted Patents = 1,379

% Expired Patents = 0.07

CIPO Patents = 11

Trademarks = 5

Forward Citations = 12,783

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1,645 inventors (with patents filed for the assignee):

Akihiro Yamaguchi (188 out of 213 patents)

Masahiro Ohta (65 out of 70 patents)

Teruyuki Nagata (63 out of 72 patents)

4. Tadashi Asanuma (60 out of 67 patents)

5. Keizaburo Yamaguchi (56 out of 58 patents)

6. Shoji Tamai (54 out of 68 patents)

7. Katsuyoshi Sasagawa (45 out of 45 patents)

8. Hisato Itoh (42 out of 49 patents)

9. Masanobu Ajioka (40 out of 61 patents)

10. Yoshimitsu Tanabe (40 out of 45 patents)

11. Masakatsu Nakatsuka (36 out of 43 patents)

12. Kiyoharu Hasegawa (36 out of 36 patents)

13. Tetsunosuke Shiomura (33 out of 34 patents)

14. Tsutomu Nishizawa (33 out of 33 patents)

15. Yoshinobu Kanemura (31 out of 45 patents)

Core Competencies:

Polyurethane Foam

Optical Materials

Biodegradable Polymers

Polyimide Resins

Monoclonal Antibodies

Aromatic Hydroxycarboxylic Acids

Thermosetting Paints

Syndiotactic Polypropylene

Conductive Laminates

Diguanamines

Color Filters

Insecticide Compositions

1,379 patents: Sort by Forward Citations

1. 6936684 - Poly (alkylene oxide) prepared in the presence of a phosphazenium salt or compound (2005-08-30),

2. 6090892 - Redispersible polymer and production process thereof (2000-07-18),

3. 6051223 - Method of improving solubility of tissue plasminogen activator (2000-04-18),

4. 5908826 - Freeze-dried preparation containing monoclonal antibody (1999-06-01),

5. 5869184 - Diguanamines and preparation process, derivatives and use thereof (1999-02-09),

6. 5837797 - Process for preparing a sulfur-containing urethane-based plastic lens (1998-11-17),

7. 5830732 - Phytase (1998-11-03),

8. 5798422 - Aromatic hydroxycarboxylic acid resins and their use (1998-08-25),

9. 5777175 - Preparation of polyoxyalkylene polyols, polymer polyols and flexible (1998-07-07),

10. 5773172 - Color filter having novel dyestuff (1998-06-30),

11. 5770683 - Preparation process of polyhydroxycarboxylic acid (1998-06-23),

12. 5770108 - Pyrimidine compound and liquid crystal composition and liquid crystal (1998-06-23),

13. 5763537 - Polyimide based resin composition (1998-06-09),

14. 5763513 - L-lactic acid polymer composition, molded product and film (1998-06-09),

15. 5760187 - Purification process of a human growth hormone (1998-06-02),

Company Overview

Mitsui Toatsu Chemicals, Incorporated, based in Tokyo, specializes in polymer chemistry, focusing on the development and manufacturing of advanced materials. The company is known for its innovations in polyurethane foam, optical materials, and biodegradable polymers, contributing to various industries including automotive and consumer goods. Additionally, Mitsui Toatsu is involved in producing polyimide resins, monoclonal antibodies, and thermosetting paints, showcasing a commitment to sustainable and high-performance solutions in material science.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Nov 3 2026

1,379 Patents

#88 in Tokyo

#164 in Japan

#724 in the World

Mitsui Toatsu Chemicals, Incorporated

Forward Citations = 12,783

1,645 inventors:

Akihiro Yamaguchi (188 out of 213 patents)

Masahiro Ohta (65 out of 70 patents)

Teruyuki Nagata (63 out of 72 patents)

4. Tadashi Asanuma (60 out of 67 patents)

5. Keizaburo Yamaguchi (56 out of 58 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Mitsui Toatsu Chemicals, Incorporated. Retrieved from https://idiyas.com/company/mitsui-toatsu-chemicals

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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