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For the Inventor, By the Inventor

Tokyo, Japan

Nof Corporation


USPTO Granted Patents = 326



Trademarks = 43

Forward Citations = 1,500

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544 inventors (with patents filed for the assignee):

goldMedal Yuji Yamamoto (26 out of 95 patents)

silverMedal Hiroki Yoshioka (22 out of 41 patents)

bronzeMedal Tohru Yasukohchi (19 out of 30 patents)

4.  Chika Itoh (18 out of 18 patents)

5.  Nobuyuki Sakamoto (16 out of 16 patents)

6.  Takuma Tsubusaki (15 out of 15 patents)

7.  Ken-ichiro Nakamoto (14 out of 14 patents)

8.  Kazuhiro Kubo (12 out of 12 patents)

9.  Yosuke Matsuoka (12 out of 12 patents)

10.  Hideki Kawamoto (11 out of 11 patents)

11.  Eui-chul Kang (11 out of 11 patents)

12.  Norio Iwakiri (10 out of 10 patents)

13.  Kenji Sakanoue (10 out of 10 patents)

14.  Atsuhiko Ogura (10 out of 10 patents)

15.  Kazuhiko Ishihara (9 out of 33 patents)


Core Competencies:
Polyethylene Glycol Derivative
Contact Lens Treatment Solution
Biodegradable Polymers
Lubricating Oil Composition
Surface Treatment Agent
Ocular Drug Retention
Thermoplastic Resin Composition
Cationic Lipids
Wax Dispersants
Fatty Acid Calcium Salts
Plant-Derived Proteoglycans
Degradable Polymers

326 patents:

1. 12448488 - Conjugate of bio-related substance and block polymer, and block polymer derivative for obtaining said conjugate (2025-10-21),
2. 12419820 - Fatty acid calcium salt particles and cosmetics (2025-09-23),
3. 12404367 - Degradable multi-arm polyethylene glycol derivative (2025-09-02),
4. 12403199 - Asymmetrically branched degradable polyethylene glycol derivative (2025-09-02),
5. 12398339 - Lubricating oil composition (2025-08-26),
6. 12390534 - Branched degradable polyethylene glycol binder (2025-08-19),
7. 12384934 - Surface treatment agent for soft contact lens (2025-08-12),
8. 12378356 - Method for purifying branched polyethylene glycol (2025-08-05),
9. 12378336 - Dewaxing aid (2025-08-05),
10. 12378333 - Phosphoryl-choline-group-containing vinyl monomer (2025-08-05),
11. 12338305 - Wax dispersant and thermoplastic resin composition (2025-06-24),
12. 12319788 - Phosphorylcholine group-containing polysiloxane monomer (2025-06-03),
13. 12318472 - Plant-derived proteoglycan and application thereof (2025-06-03),
14. 12304999 - Method for purifying polyethylene glycol compound (2025-05-20),
15. 12239713 - Degradable polyethylene glycol conjugate (2025-03-04),
NOF CORPORATION is a global multi-business chemicals manufacturer headquartered in Japan. Operating in various sectors, including Chemicals, Pharma & Nutraceuticals, and Environmental Solutions, NOF delivers high-quality products and services worldwide. With a commitment to innovation and sustainability, NOF strives to contribute to the advancement of society and the well-being of people.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 23 2025

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326 Patents

#230 in Tokyo

#494 in Japan

#2,681 in the World

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Tokyo, Japan

Nof Corporation

Forward Citations = 1,500

544 inventors:

goldMedal Yuji Yamamoto (26 out of 95 patents)

silverMedal Hiroki Yoshioka (22 out of 41 patents)

bronzeMedal Tohru Yasukohchi (19 out of 30 patents)

4.  Chika Itoh (18 out of 18 patents)

5.  Nobuyuki Sakamoto (16 out of 16 patents)

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