Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6025308 | Amine-functionalized polymers | Thomas J. Karol | 2000-02-15 |
| 5891831 | Viscosity index improver, engine lubricant composition, and concentrate | Koji Takeuchi | 1999-04-06 |
| 5763374 | Lubricating oil compositions of reduced high-temperature high-shear viscosity | Kouzou Sakai, Yoshihisa Ohta | 1998-06-09 |
| 5622924 | Viscosity index improver and lubricating oil | Kouzou Sakai, Yoshihisa Ohta | 1997-04-22 |
| 4983545 | Planarization of dielectric films on integrated circuits | Hiroshi Gokan, Masahito Mukainaru, Masayoshi Suzuki, Hisanao Tsuge | 1991-01-08 |