Welborn, Jr.; Howard C.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Welborn, Jr.; Howard C..The latest application filed is for "catalyst compounds for olefin polymerization".
- Welborn, Jr.; Howard C. - Houston TX
| Patent | Date |
|---|---|
| Catalyst compounds for olefin polymerization Grant 5,633,394 - Welborn, Jr. , et al. May 27, 1 | 1997-05-27 |
| Process and catalyst for polyolefin density and molecular weight control Grant 5,580,939 - Ewen , et al. December 3, 1 | 1996-12-03 |
| Silicon-bridged transition metal compounds Grant 5,441,920 - Welborn, Jr. * August 15, 1 | 1995-08-15 |
| Process and catalyst for polyolefin density and molecular weight control Grant 5,324,800 - Welborn, Jr. , et al. June 28, 1 | 1994-06-28 |
| Silicon-bridged transition metal compounds Grant 5,314,973 - Welborn, Jr. May 24, 1 | 1994-05-24 |
| Copolymers of ethylene and 1,3-butadiene Grant 5,191,052 - Welborn, Jr. March 2, 1 | 1993-03-02 |
| Polymerization process using a new supported polymerization catalyst Grant 5,183,867 - Welborn, Jr. February 2, 1 | 1993-02-02 |
| Supported polymerization catalyst Grant 5,124,418 - Welborn, Jr. June 23, 1 | 1992-06-23 |
| Silicon-bridged transition metal compounds Grant 5,120,867 - Welborn, Jr. June 9, 1 | 1992-06-09 |
| High pressure, high temperature polymerization of ethylene Grant 5,084,534 - Welborn, Jr. , et al. January 28, 1 | 1992-01-28 |
| New supported polymerization catalyst Grant 5,077,255 - Welborn, Jr. December 31, 1 | 1991-12-31 |
| Silicon-bridged transition metal compounds Grant 5,017,714 - Welborn, Jr. May 21, 1 | 1991-05-21 |
| Metallocene, hydrocarbylaluminum and hydrocarbylboroxine olefin polymerization catalyst Grant 5,001,244 - Welborn, Jr. March 19, 1 | 1991-03-19 |
| Non-aqueous process for the preparation of alumoxanes Grant 4,952,714 - Welborn, Jr. August 28, 1 | 1990-08-28 |
| Process and catalyst for producing reactor blend polyolefins Grant 4,937,299 - Ewen , et al. * June 26, 1 | 1990-06-26 |
| Process and catalyst for producing polyethylene having a broad molecular weight distribution Grant 4,935,474 - Ewen , et al. June 19, 1 | 1990-06-19 |
| Polymerization process Grant 4,897,455 - Welborn, Jr. January 30, 1 | 1990-01-30 |
| Supported polymerization catalyst Grant 4,808,561 - Welborn, Jr. February 28, 1 | 1989-02-28 |
| Supported polymerization catalyst Grant 4,701,432 - Welborn, Jr. October 20, 1 | 1987-10-20 |
| Process for the preparation of alumoxanes Grant 4,665,208 - Welborn, Jr. , et al. May 12, 1 | 1987-05-12 |
| Process and catalyst for producing polyethylene having a broad molecular weight distribution Grant 4,530,914 - Ewen , et al. July 23, 1 | 1985-07-23 |
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