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Nof Corporation

USPTO Granted Patents = 344

% Expired Patents = 13.4

CIPO Patents = 17

EPO Patents = 175

Trademarks = 28

Forward Citations = 1,536

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570 inventors (with patents filed for the assignee):

Yuji Yamamoto (26 out of 95 patents)

Hiroki Yoshioka (24 out of 43 patents)

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. Norio Iwakiri (12 out of 12 patents)

11. Kota Tange (11 out of 11 patents)

12. Hideki Kawamoto (11 out of 11 patents)

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

14. Shunsuke Sakurai (10 out of 12 patents)

15. Kenji Sakanoue (10 out of 10 patents)

Core Competencies:

Polyethylene Glycol

Biodegradable Derivative

Branched Polymer

Contact Lens

Hydrophilic Polymer

Antibody-Drug Conjugate

Lubricating Oil

Lipid Nanoparticle

Surfactant Composition

Ocular Drug Retention

Thermoplastic Resin

Solid Soap

344 patents: Sort by Forward Citations

1. 12747314 - Surface treatment agent for ophthalmic device (2026-09-29),

2. 12746202 - Cationic lipid having disulfide bond, lipid membrane structure including same, nucleic acid introduction agent and pharmaceutical composition containing any one of same, method for introducing nucleic acid into cell or target cell, and method for producing cellular pharmaceutical (2026-09-29),

3. 12723223 - Cleaning agent for electroconductive paste and method for cleaning electroconductive paste (2026-09-01),

4. 12715944 - Modifier for ophthalmological device (2026-08-25),

5. 12674025 - Branched type hetero monodispersed polyethylene glycol, production method thereof, and conjugate thereof (2026-07-07),

6. 12668662 - Method for producing maleimide polyethylene glycol lipid (2026-06-30),

7. 12653898 - Polyoxyethylene derivatives and conjugates thereof (2026-06-16),

8. 12636310 - Therapeutic agent for short tear breakup time-type dry eye and eye drops containing same (2026-05-26),

9. 12622979 - Lipid nanoparticle used for delivering nucleic acid to brain tissue (2026-05-12),

10. 12622878 - Cationic lipid having cystine skeleton (2026-05-12),

11. 12600677 - Ceramic green sheet lamination aid and ceramic green sheet composition (2026-04-14),

12. 12595336 - Method for producing maleimide polyethylene glycol derivative (2026-04-07),

13. 12583967 - Branched type hetero monodispersed polyethylene glycol, production method thereof, and conjugate thereof (2026-03-24),

14. 12577221 - Cyclocarbonate group-containing (meth)acrylate monomer and polymer (2026-03-17),

15. 12559681 - Solubilizing agent and solubilizing solution (2026-02-24),

Company Overview

Nof Corporation, headquartered in Tokyo, Japan, specializes in the development and manufacturing of polyethylene glycol derivatives. The company focuses on innovative applications of hydrophilic polymers, including biodegradable derivatives and branched polymers. Nof's expertise extends to various sectors, such as contact lens materials, antibody-drug conjugates, and lubricating oils, as well as lipid nanoparticles for drug delivery systems. Their commitment to research and development positions them as a key player in the polymer and biotechnology industries.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

344 Patents

#245 in Tokyo

#488 in Japan

#2,647 in the World

Nof Corporation

Forward Citations = 1,536

570 inventors:

Yuji Yamamoto (26 out of 95 patents)

Hiroki Yoshioka (24 out of 43 patents)

Tohru Yasukohchi (19 out of 30 patents)

4. Chika Itoh (18 out of 18 patents)

5. Nobuyuki Sakamoto (16 out of 16 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nof Corporation. Retrieved from https://idiyas.com/company/nof

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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