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Tonen Corporation

USPTO Granted Patents = 141

CIPO Patents = 1

Forward Citations = 1,844

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262 inventors (with patents filed for the assignee):

Hirotaka Tomizawa (13 out of 29 patents)

Satoshi Ueki (12 out of 32 patents)

Hiroyuki Furuhashi (10 out of 34 patents)

4. Takeshi Isoda (9 out of 25 patents)

5. Toshiaki Kuribayashi (8 out of 12 patents)

6. Hiroshi Ueno (7 out of 71 patents)

7. Makoto Kanbara (7 out of 8 patents)

8. Osamu Funayama (7 out of 20 patents)

9. Hiroshi Inoue (7 out of 42 patents)

10. Makoto Takezawa (7 out of 7 patents)

11. Makoto Saito (7 out of 7 patents)

12. Yasuo Shimizu (6 out of 221 patents)

13. Yuji Fujita (6 out of 14 patents)

14. Masahide Murata (6 out of 20 patents)

15. Kazuo Hirano (6 out of 23 patents)

Core Competencies:

Hydrotreating Catalyst

Lubricant Oil Composition

Diesel Fuel Oil Composition

Electrolyte for Lithium Cells

Polysilazane Production

Ceramic Material Formation

Hydrogenation Treatment

Cracking Heavy Oil

Reinforcing Fiber Sheet

Aliphatic Polyester

Fluid Couplings

Antigenic Peptides

141 patents: Sort by Forward Citations

1. 6576584 - Method for producing hydrotreating catalyst (2003-06-10),

2. 6511933 - Catalyst for cracking heavy oil (2003-01-28),

3. 6436870 - Hydrotreating catalyst for hydrotreating hydrocarbon oils (2002-08-20),

4. 6383688 - Electrolyte for lithium cells and method of producing the same (2002-05-07),

5. 6310168 - Aminated polysilazane and process for the preparation thereof (2001-10-30),

6. 6306289 - Catalyst for hydrogenation treatment and method for hydrogenation treatment of hydrocarbon oil (2001-10-23),

7. 6245719 - Lubricant oil composition (2001-06-12),

8. 6215034 - Base fuel oil for diesel fuel oil and diesel fuel oil composition comprising the same (2001-04-10),

9. 6207625 - Lubricant oil composition for diesel engines (LAW913) (2001-03-27),

10. 6191080 - Heat resistant lubricating oil composition (2001-02-20),

11. 6187171 - Unleaded high-octane gasoline composition (2001-02-13),

12. 6184185 - Lubricant oil composition comprising borated cyclic carboxylic acid imide (2001-02-06),

13. 6147035 - Lubricating oil composition containing overbased metal salicylate, amine (2000-11-14),

14. 6140283 - Lubricant oil composition for internal combustion engines (2000-10-31),

15. 6136050 - Diesel fuel oil composition (2000-10-24),

Tonen Corporation is a leading multinational energy company operating in the petroleum and petrochemical industries. With a strong focus on innovation and sustainability, Tonen Corporation strives to deliver high-quality energy solutions to meet the evolving needs of customers worldwide. Through cutting-edge technology and a commitment to excellence, Tonen Corporation has established itself as a trusted and respected leader in the industry.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

141 Patents

#14 in Saitama 343-0827

#871 in Japan

#5,604 in the World

Tonen Corporation

Forward Citations = 1,844

262 inventors:

Hirotaka Tomizawa (13 out of 29 patents)

Satoshi Ueki (12 out of 32 patents)

Hiroyuki Furuhashi (10 out of 34 patents)

4. Takeshi Isoda (9 out of 25 patents)

5. Toshiaki Kuribayashi (8 out of 12 patents)

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