Issued Patents All Time
Showing 126–150 of 234 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820432 | Lactone-modified, Mannich base dispersant additives useful in oleaginous compositions | Antonio Gutierrez | 1989-04-11 |
| 4788081 | Biodegradable coatings of ionomer polymer | Warren A. Thaler, Pacifico V. Manalastas, Evelyn N. Drake | 1988-11-29 |
| H495 | Drilling fluids based on hydrocarbon soluble polyampholytes | Dennis G. Peiffer, Lawrence P. Sedillo, John C. Newlove | 1988-07-05 |
| 4751011 | Hydrocarbon soluble complexes based on metal salts of polyolefinic dicarboxylic acids | Alan A. Schetelich, Antonio Gutierrez, Robert R. Phillips | 1988-06-14 |
| 4741956 | Biodegradable coatings of ionomer polymer | Warren A. Thaler, Pacifico V. Manalastas, Evelyn N. Drake | 1988-05-03 |
| 4739834 | Controlled hydraulic fracturing via nonaqueous solutions containing low charge density polyampholytes | Dennis G. Peiffer, Lawrence P. Sedillo, John C. Newlove | 1988-04-26 |
| 4738997 | Asphalt blends based on polymer complexes | Ilan Duvdevani, Dennis G. Peiffer | 1988-04-19 |
| 4737534 | Method for controlling viscosity of organic liquids and compositions thereof | Robert R. Phillips, Dennis G. Peiffer, Ilan Duvdevani | 1988-04-12 |
| 4710555 | Novel polyampholyte compositions possessing high degrees of acid, base, or salt tolerance in solution | Dennis G. Peiffer | 1987-12-01 |
| H363 | Dilatant behavior of a solution of a sulfonated polymer | Ilan Duvdevani | 1987-11-03 |
| 4692268 | Method for controlling viscosity of organic liquids and compositions | Robert R. Phillips, L. Sherwood Minckler, David Yen-Lung Chung | 1987-09-08 |
| 4683952 | Fluid loss control in oil field cements | Dennis G. Peiffer, Lawrence P. Sedillo, John C. Newlove | 1987-08-04 |
| 4665115 | Method for controlling viscosity of organic liquids and compositions | Robert R. Phillips, Dennis G. Peiffer, Ilan Duvdevani | 1987-05-12 |
| 4656204 | Process for use of drag reduction agent in a hydrocarbon liquid | Ilan Duvdevani, Ralph M. Kowalik, Dennis G. Peiffer | 1987-04-07 |
| 4647603 | Controlled gelation of hydrocarbon solutions containing interpolymer complexes | Ilan Duvdevani, Dennis G. Peiffer | 1987-03-03 |
| 4640945 | Drag reduction with novel hydrocarbon soluble polyampholytes | Dennis G. Peiffer, Ralph M. Kowalik | 1987-02-03 |
| 4637882 | Polyampholytes - high temperature viscosifiers for high ionic strength drilling fluids | Dennis G. Peiffer, Kenneth W. Pober | 1987-01-20 |
| 4627926 | Thermally stable borehole fluids | Dennis G. Peiffer, Lawrence P. Sedillo, John C. Newlove | 1986-12-09 |
| 4626285 | Fluid loss control in oil field cements | Dennis G. Peiffer, Lawrence P. Sedillo, John C. Newlove | 1986-12-02 |
| 4617337 | Novel polymer compositions based on sulfonated ionomers and amine containing polymers | Dennis G. Peiffer, Robert R. Phillips | 1986-10-14 |
| 4615393 | Hydrocarbon soluble polymer complexes useful as viscosifiers in fracturing operations | Lawrence P. Sedillo, John C. Newlove, Dennis G. Peiffer | 1986-10-07 |
| 4608425 | High charge density polymeric complexes - viscosifiers for acid, base and salt (aqueous) solutions | Dennis G. Peiffer | 1986-08-26 |
| 4584339 | Dilatant behavior of interpolymer complexes in aqueous solution | Dennis G. Peiffer, Ilan Duvdevani | 1986-04-22 |
| 4579671 | Hydrocarbon soluble polymer complexes useful as viscosifiers in fracturing operations | Dennis G. Peiffer, Lawrence P. Sedillo, John C. Newlove | 1986-04-01 |
| 4579669 | High temperature drilling fluids based on sulfonated thermoplastic polymers | Thad O. Walker, Dennis G. Peiffer | 1986-04-01 |