Issued Patents All Time
Showing 25 most recent of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11945896 | Catalyst composition and system having extended lifetime | Joseph N. Coalter, III, Rose Kent, Adam Marwitz, Ronald A. Epstein | 2024-04-02 |
| 11014995 | Procatalyst composition made with a combination of internal electron donors | Ronald A. Epstein, Timothy A. Boyer, Courtney S. Spain, Michael S. Miller | 2021-05-25 |
| 9045569 | Process of making modified metallocene catalyst, catalyst produced and use thereof | Michael D. Jensen, Andrew G. Singleton, Stephen R. Schmidt, Patrick J. Kerwin, John H. Hain, Jr. +1 more | 2015-06-02 |
| 7851644 | Heterocyclic metallocenes and polymerization catalysts | John A. Ewen, Robert L. Jones, Yuri A. Dubitsky | 2010-12-14 |
| 7723450 | Transition metal compound, ligand system, catalyst system and process for preparing polyolefins | Robert L. Jones, Jennifer Kipke, Alexander Koeppl, Markus Schopf, John A. Ewen | 2010-05-25 |
| 7606422 | System, method and computer program for an integrated digital workflow for processing a paper form | Robert Smith, Andrew Maxwell | 2009-10-20 |
| 7544749 | Polymerization catalysts, organic transition metal compounds, process for preparing polyolefins and polyolefins | Robert L. Jones, Naka Seidel, John A. Ewen | 2009-06-09 |
| 7531672 | Preparation of heterocyclic ketones | Robert L. Jones | 2009-05-12 |
| 7504354 | Organometallic transition metal compound, biscyclopentadienyl ligand system, catalyst system and process for preparing polyolefins | Robert L. Jones, John A. Ewen | 2009-03-17 |
| 7492946 | System, method and computer program for an integrated digital workflow for processing a paper form | Robert Smith, Andrew Maxwell | 2009-02-17 |
| 7452949 | Organometallic transition metal compound, biscyclopentadienyl ligand system, catalyst system and preparation of polyolefins | Yoshikuni Okumura, Ilya Nifant'ev, Pavel V. Ivchenko, Vladimir Bagrov | 2008-11-18 |
| 7238818 | Heterocyclic metallocenes and polymerization catalysts | John A. Ewen, Robert L. Jones, Yuri A. Dubitsky | 2007-07-03 |
| 7141637 | Metallocene compounds and process for the preparation of propylene polymers | Robert L. Jones | 2006-11-28 |
| 6810120 | Method of determining answer supervision at a line appearance of a public switch telephone network | Joseph Kott, Raymond L. Ruggerio, Jane Ann Thompson, Robin Jeffrey Thompson, Kimberly Sue Tomasko-Dean | 2004-10-26 |
| 6635779 | Metallocene compounds, process for their preparation and their use in catalytic systems for the polymerization of olefins | John A. Ewen, Robert L. Jones | 2003-10-21 |
| 6444833 | Metallocene compounds, process for their preparation and their use in catalytic systems for the polymerization of olefins | John A. Ewen, Robert L. Jones | 2002-09-03 |
| 6403772 | Open-pentadienyl metallocenes, precursors thereof and polymerization catalysts therefrom | John A. Ewen, Robert W. Strozier, Robert L. Jones | 2002-06-11 |
| 6262199 | Process and catalyst for producing isotactic polyolefins | John A. Ewen, B. Raghava Reddy | 2001-07-17 |
| 5883202 | Process for olefin polymerization using metallocene catalysts with Lewis acids and aluminum alkyls | John A. Ewen | 1999-03-16 |
| 5807939 | Polymerization of alpha-olefins with cationic metallocene catalysts based on organoaluminum anions | John A. Ewen | 1998-09-15 |
| 5763549 | Cationic metallocene catalysts based on organoaluminum anions | John A. Ewen | 1998-06-09 |
| 5710222 | Method for controlling the melting points and molecular weights of syndiotactic polyolefins using metallocene catalyst systems | John A. Ewen, B. Raghava Reddy | 1998-01-20 |
| 5688735 | Method for controlling the melting points and molecular weights of syndiotactic polyolefins using metallocene catalyst systems | John A. Ewen, B. Raghava Reddy | 1997-11-18 |
| 5663249 | Catalyst and process for polymerization of olefins | John A. Ewen | 1997-09-02 |
| 5614457 | Catalyst system using aluminum alkyl with ion-pair metallocene catalysts | John A. Ewen | 1997-03-25 |