Birkelbach; Donald F.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Birkelbach; Donald F..The latest application filed is for "process for polymerizing alpha-olefins".
- Birkelbach; Donald F. - Angleton TX
| Patent | Date |
|---|---|
| Process for polymerizing alpha-olefins Grant 4,451,626 - Shipley , et al. May 29, 1 | 1984-05-29 |
| High efficiency catalyst containing titanium, zirconium and zinc for polymerizing olefins Grant 4,399,053 - Shipley , et al. * August 16, 1 | 1983-08-16 |
| Ultra high efficiency catalyst for polymerizing olefins Grant 4,380,508 - Shipley , et al. April 19, 1 | 1983-04-19 |
| High efficiency catalyst for polymerizing olefins Grant 4,308,369 - Shipley , et al. December 29, 1 | 1981-12-29 |
| High efficiency catalyst for polymerizing olefins Grant 4,224,186 - Lowery, Jr. , et al. September 23, 1 | 1980-09-23 |
| High efficiency catalyst for polymerizing olefins Grant 4,198,315 - Birkelbach , et al. April 15, 1 | 1980-04-15 |
| High efficiency catalyst for polymerizing olefins Grant 4,189,553 - Birkelbach February 19, 1 | 1980-02-19 |
| High efficiency catalyst for polymerizing olefins Grant 4,120,820 - Birkelbach October 17, 1 | 1978-10-17 |
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