Issued Patents All Time
Showing 26–50 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5688735 | Method for controlling the melting points and molecular weights of syndiotactic polyolefins using metallocene catalyst systems | B. Raghava Reddy, Michael J. Elder | 1997-11-18 |
| 5663249 | Catalyst and process for polymerization of olefins | Michael J. Elder | 1997-09-02 |
| 5633394 | Catalyst compounds for olefin polymerization | Howard C. Welborn, Jr. | 1997-05-27 |
| 5631202 | Stereospecific metallocene catalysts with stereolocking .alpha.-CP substituents | — | 1997-05-20 |
| 5614457 | Catalyst system using aluminum alkyl with ion-pair metallocene catalysts | Michael J. Elder | 1997-03-25 |
| 5580939 | Process and catalyst for polyolefin density and molecular weight control | Howard C. Welborn, Jr. | 1996-12-03 |
| 5561092 | Metallocene catalysts with lewis acids and aluminum alkyls | Michael J. Elder | 1996-10-01 |
| 5519100 | Addition of aluminum alkyl for improved metallocene catalyst | Michael J. Elder | 1996-05-21 |
| 5476914 | Syndiotactic polypropylene | Abbas Razavi | 1995-12-19 |
| 5459117 | Doubly-conformationally locked, stereorigid catalysts for the preparation of tactiospecific polymers | — | 1995-10-17 |
| 5416228 | Process and catalyst for producing isotactic polyolefins | Michael J. Elder | 1995-05-16 |
| 5393851 | Process for using metallocene catalyst in a continuous reactor system | Shabbir Malbari | 1995-02-28 |
| 5387568 | Preparation of metallocene catalysts for polymerization of olefins | Michael J. Elder | 1995-02-07 |
| 5334677 | Process for producing syndiotactic polyolefins | Abbas Razavi | 1994-08-02 |
| 5324800 | Process and catalyst for polyolefin density and molecular weight control | Howard C. Welborn, Jr. | 1994-06-28 |
| 5225500 | Process and catalyst for producing syndiotactic polyolefins | Michael J. Elder, Abbas Razavi | 1993-07-06 |
| 5155080 | Process and catalyst for producing syndiotactic polyolefins | Michael J. Elder, Abbas Razavi | 1992-10-13 |
| 5122583 | Efficiency of a pre-polymerized catalyst | Alan Bitzer, David L. Gressett, Herbert Hummel | 1992-06-16 |
| 5066738 | Polymerization of olefins with an improved catalyst system using a new electron donor | — | 1991-11-19 |
| 5036034 | Catalyst for producing hemiisotactic polypropylene | — | 1991-07-30 |
| 4975403 | Catalyst systems for producing polyolefins having a broad molecular weight distribution | — | 1990-12-04 |
| 4937299 | Process and catalyst for producing reactor blend polyolefins | Howard C. Welborn, Jr. | 1990-06-26 |
| 4935474 | Process and catalyst for producing polyethylene having a broad molecular weight distribution | Howard C. Welborn, Jr. | 1990-06-19 |
| 4927797 | Catalyst system for the polymerization of olefins | — | 1990-05-22 |
| 4892851 | Process and catalyst for producing syndiotactic polyolefins | Abbas Razavi | 1990-01-09 |