Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12234354 | Viscosity index improvers | Tomohiro Matsuda, Boris Eisenberg | 2025-02-25 |
| 11795413 | Viscosity index improver and lubricant compositions thereof | Tomohiro Matsuda, Yasuo Arai | 2023-10-24 |
| 11639481 | Lubricant additive composition | Yasuo Arai, Tomohiro Matsuda, Nobuhiro Kishida | 2023-05-02 |
| 10941368 | Lubricating oil composition comprising dispersant comb polymers | Yasuo Arai, Tomohiro Matsuda, Nobuhiro Kishida | 2021-03-09 |
| 7579305 | Friction regulator for lubricating oil and lubricating oil composition | Minoru Nishida | 2009-08-25 |
| 7557241 | Method for producing α,β-unsaturated carboxylic acid ester, α,β-unsaturated carboxylic acid ester, and lubricating oil additive | Hideo Nakanishi, Satoshi Utsui | 2009-07-07 |
| 6746993 | Viscosity index improver and lube oil containing the same | Yoshihisa Ota | 2004-06-08 |
| 6284362 | Absorbent compositions, methods for producing thereof and absorbent products | Hitoshi Takai, Shingo Mukaida, Daisuke Tagawa, Kenji Tanaka, Keiji Tanaka +2 more | 2001-09-04 |
| 6156678 | Water absorbing agent absorbent material | Shingo Mukaida, Kenji Tanaka | 2000-12-05 |
| 5886120 | Method for preparing water absorbent resin | Keiji Tanaka, Masashi Date, Kenjiro Tsubota, Satoshi Tamabuchi | 1999-03-23 |
| 5801238 | Method for producing water absorbent resin and water absorbent | Keiji Tanaka, Masashi Date, Kenjiro Tsubota, Satoshi Tamabuchi | 1998-09-01 |
| 5789507 | Method for preparing water absorbent resin | Keiji Tanaka, Masashi Date, Satoshi Tamabuchi, Kenjiro Tsubota | 1998-08-04 |
| 5747570 | Water-absorbing resin composition | Masashi Date, Keiji Tanaka, Kenjiro Tsubota, Satoshi Tamabuchi | 1998-05-05 |
| 5728792 | Method for preparing water absorbent resin | Keiji Tanaka, Masashi Date, Kenjiro Tsubota, Satoshi Tamabuchi | 1998-03-17 |