Tomkinson, Donald L.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Tomkinson, Donald L..The latest application filed is for "method of in-mold sulfonation of molded plastic article".
- Tomkinson, Donald L. - Auburn MI
| Patent | Date |
|---|---|
| Method of in-mold sulfonation of molded plastic article Grant 5,030,399 - Walles , et al. July 9, 1 | 1991-07-09 |
| Controlled-release compositions for acids Grant 4,923,753 - Walles , et al. May 8, 1 | 1990-05-08 |
| Process for the generation of sulfur trioxide reagent and sulfonation of the surface of polymeric resins Grant 4,902,493 - Walles , et al. February 20, 1 | 1990-02-20 |
| Mold sulfonation system Grant 4,861,250 - Walles , et al. August 29, 1 | 1989-08-29 |
| Controlled-release composition having a membrane comprising submicron particles Grant 4,756,844 - Walles , et al. July 12, 1 | 1988-07-12 |
| Method for treating subterranean formations Grant 4,741,401 - Walles , et al. May 3, 1 | 1988-05-03 |
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