Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7230128 | Organometallic fluorenyl compounds, preparations, and use | Helmut G. Alt, Syriac J. Palackal, M. Bruce Welch, Rolf L. Geerts, Eric T. Hsieh +3 more | 2007-06-12 |
| 6420579 | Organometallic fluorenyl compounds, preparation, and use | Helmut G. Alt, Syriac J. Palackal, M. Bruce Welch, Rolf L. Geerts, Eric T. Hsieh +3 more | 2002-07-16 |
| 6403734 | Organometallic fluorenyl compounds, preparation, and use | Helmut G. Alt, Syriac J. Palackal, M. Bruce Welch, Rolf L. Geerts, Eric T. Hsieh +3 more | 2002-06-11 |
| 6162936 | Organometallic fluorenyl compounds, preparation, and use | Helmut G. Alt, Syriac J. Palackal, M. Bruce Welch, Rolf L. Geerts, Eric T. Hsieh +3 more | 2000-12-19 |
| 5637744 | Bis fluorenyl metallocenes and use thereof | Helmut G. Alt, M. Bruce Welch, Peter P. Chu | 1997-06-10 |
| 5631335 | Process of polymerizing olefins using diphenylsilyl or dimethyl tin bridged 1-methyl fluorenyl metallocenes | Helmut G. Alt, M. Bruce Welch, Peter P. Chu | 1997-05-20 |
| 5627118 | Silyl bridged metallocenes and use thereof | Syriac J. Palackal, Helmut G. Alt, Tara G. Hill, Gil R. Hawley, Peter P. Chu +2 more | 1997-05-06 |
| 5627247 | Organometallic fluorenyl compounds and use thereof in olefin polymerization | Helmut G. Alt, Gil R. Hawley, Paul D. Smith, Syriac J. Palackal, Michael Schmid +4 more | 1997-05-06 |
| 5616752 | Metallocenes and processes therefor and therewith | Bernd Peifer, Helmut G. Alt, Rolf L. Geerts, Darryl R. Fahey, M. Bruce Welch +2 more | 1997-04-01 |
| 5610247 | Unbridged metallocenes of 9-substituted fluorenyl compounds and use thereof | Helmut G. Alt, Syriac J. Palackal, M. Bruce Welch, Rolf L. Geerts, Eric T. Hsieh +5 more | 1997-03-11 |
| 5565592 | Vinly-substituted bridged metallocenes | Bernd Peifer, Syriac J. Palackal, Helmut G. Alt, M. Bruce Welch, Rolf L. Geerts +2 more | 1996-10-15 |
| 5541351 | Cyclopentadiene type compounds and method for making | Syriac J. Palackal, Helmut G. Alt | 1996-07-30 |
| 5466766 | Metallocenes and processes therefor and therewith | Bernd Peifer, Syriac J. Palackal, Helmut G. Alt, M. Bruce Welch, Rolf L. Geerts +2 more | 1995-11-14 |
| 5459218 | Syndiotactic polypropylene prepared using silyl bridged metallocenes | Syriac J. Palackal, Helmut G. Alt, Tara G. Hill, Gil R. Hawley, Peter P. Chu +2 more | 1995-10-17 |
| 5436305 | Organometallic fluorenyl compounds, preparation, and use | Helmut G. Alt, Syriac J. Palackal, M. Bruce Welch, Rolf L. Geerts, Eric T. Hsieh +3 more | 1995-07-25 |
| 5406013 | Cyclopentadiene type compounds and method for making | Syriac J. Palackal, Helmut G. Alt | 1995-04-11 |
| 5401817 | Olefin polymerization using silyl-bridged metallocenes | Syriac J. Palackal, Helmut G. Alt, Tara G. Hill, Gil R. Hawley, Peter P. Chu +2 more | 1995-03-28 |
| 5399636 | Metallocenes and processes therefor and therewith | Helmut G. Alt, M. Bruce Welch, Rolf L. Geerts, Bernd Peifer, Syriac J. Palackal | 1995-03-21 |
| 5393911 | Cyclopentadiene type compounds and method for making | Syriac J. Palackal, Helmut G. Alt | 1995-02-28 |
| 5347026 | Fluorene compounds and methods for making | H. G. Alt, Syriac J. Palackal | 1994-09-13 |
| 5191132 | Cyclopentadiene type compounds and method for making | Syriac J. Palackal, Helmut G. Alt | 1993-03-02 |