Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5216054 | Polymer composition | Kunio Iwanami, Yukihiko Yagi, Takashi Mikami | 1993-06-01 |
| 5153289 | Betaine copolymers-viscosifiers for water and brine | Donald N. Schulz | 1992-10-06 |
| 5147931 | Thermoplastic resin composition | Masato Sakuma, Yuji Fujita, Yukihiko Yagi, Masao Sakaizawa, Noburo Yamamoto | 1992-09-15 |
| 5106893 | Fiber-reinforced polymer composition | Kunio Iwanami, Kiyotada Narukawa, Masato Sakuma, Takashi Mikami, Masami Esaki +3 more | 1992-04-21 |
| 5106564 | Method of and apparatus for making fiber-reinforced polymer compositions | Kunio Iwanami, Kiyotada Narukawa, Kenichi Aoki, Yukihiko Yagi, Masato Sakuma +5 more | 1992-04-21 |
| 5013789 | Process for producing thermoplastic resin compositions | Masato Sakuma, Yuji Fujita, Yukihiko Yagi, Masao Sakaizawa, Noburo Yamamoto | 1991-05-07 |
| 4990550 | Fiber-reinforced polymer composition and method of producing same | Kunio Iwanami, Kiyotada Narukawa, Kenichi Aoki, Yukihiko Yagi, Masato Sakuma +5 more | 1991-02-05 |
| 4880436 | Method for controlling viscosity of organic liquid and compositions | Ilan Duvdevani, Donald N. Schulz | 1989-11-14 |
| 4715865 | Method for controlling viscosity of organic liquids and compositions | Ilan Duvdevani, Donald N. Schulz | 1987-12-29 |
| 4625745 | Drag reduction agents for hydrocarbon solutions | Ralph M. Kowalik, Ilan Duvdevani, Donald N. Schulz | 1986-12-02 |
| 4621111 | Acid base interacting polymer solutions | Ilan Duvdevani, Donald N. Schulz, Dennis G. Peiffer | 1986-11-04 |
| 4607076 | Betaine copolymers-viscosifiers for water and brine | Donald N. Schulz | 1986-08-19 |
| 4599377 | Acid base interacting polymer solutions | Ilan Duvdevani, Donald N. Schulz, Dennis G. Peiffer | 1986-07-08 |
| 4586937 | Antimisting system for hydrocarbon fluids | Ilan Duvdevani, John A. Eckert, Donald N. Schulz | 1986-05-06 |
| 4523929 | Antimisting system for hydrocarbon fluids | Ilan Duvdevani, John A. Eckert, Donald N. Schulz | 1985-06-18 |
| 4518757 | Drag reduction agent for hydrocarbon liquid | Donald N. Schulz, Terry J. Burkhardt, Arthur W. Langer, Jr. | 1985-05-21 |
| 4480693 | Fluid loss control in oil field cements | John C. Newlove, Robert C. Portnoy, Donald N. Schulz | 1984-11-06 |