Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D858006 | Cat litter box | — | 2019-08-27 |
| RE33856 | Terpolymer compositions for aqueous drilling fluids | Charles D. Williamson | 1992-03-24 |
| RE33855 | Terpolymer composition for aqueous drilling fluids | Charles D. Williamson | 1992-03-24 |
| 4770795 | Calcium tolerant deflocculant for drilling fluids | Dodd W. Fong | 1988-09-13 |
| 4678591 | Terpolymer composition for aqueous drilling fluids | Charles D. Williamson | 1987-07-07 |
| 4555558 | Terpolymers of 2-acrylamido-2-methylpropane-sulfonic acid, sodium salt (AMPS), N,N-dimethylacrylamide, and acrylonitrile | Donald G. Ries, Allen R. Syrinek | 1985-11-26 |
| 4544719 | Water-soluble polymers containing 2-acrylamido-2-methylpropane-sulfonic acid, sodium salt (AMPS)-acrylamide-N,N-diallylacetamide | Donald G. Ries, Allen R. Syrinek | 1985-10-01 |
| 4544722 | Water-soluble terpolymers of 2-acrylamido-2-methylpropane-sulfonic acid, sodium salt (AMPS), n-vinylpyrrolidone and acrylonitrile | Donald G. Ries, Allen R. Syrinek | 1985-10-01 |
| 4502965 | Terpolymers for use as high temperature fluid loss additive and rheology stabilizer for high pressure, high temperature oil well drilling fluids | Donald G. Ries, Allen R. Syrinek | 1985-03-05 |
| 4502966 | Terpolymers for use as high temperature fluid loss additive and rheology stabilizer for high pressure, high temperature oil well drilling fluids | Donald G. Ries, Allen R. Syrinek | 1985-03-05 |
| 4502964 | Terpolymers for use as high temperature fluid loss additive and rheology stabilizer for high pressure, high temperature oil well drilling fluids | Donald G. Ries, Allen R. Syrinek | 1985-03-05 |