Patent | Date |
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Heterocyclic metallocenes and polymerization catalysts Grant 7,851,644 - Ewen , et al. December 14, 2 | 2010-12-14 |
Heterocyclic metallocenes and polymerization catalysts App 20090286945 - Ewen; John A. ;   et al. | 2009-11-19 |
Polymerization catalysts, organic transition metal compounds, process for preparing polyolefins and polyolefins Grant 7,544,749 - Jones , et al. June 9, 2 | 2009-06-09 |
Organometallic transition metal compound, biscyclopentadienyl ligand system, catalyst system and process for preparing polyolefins Grant 7,504,354 - Elder , et al. March 17, 2 | 2009-03-17 |
Heterocyclic metallocenes and polymerization catalysts App 20080090978 - Ewen; John A. ;   et al. | 2008-04-17 |
Alpha olefin catalyst systems Grant 7,332,456 - Ewen February 19, 2 | 2008-02-19 |
Transition Metal Compound, Ligand System, Catalyst System and Process for Preparing Polyolefins App 20070260023 - Jones; Robert L. ;   et al. | 2007-11-08 |
Organometallic Transition Metal Compound, Biscyclopentadienyl Ligand System, Catalyst System and Process for Preparing Polyolefins App 20070260025 - Elder; Michael J. ;   et al. | 2007-11-08 |
Heterocyclic metallocenes and polymerization catalysts Grant 7,238,818 - Ewen , et al. July 3, 2 | 2007-07-03 |
Heterocyclic metallocenes and polymerization catalysts App 20050192418 - Ewen, John A. ;   et al. | 2005-09-01 |
Alpha olefin catalyst systems App 20050165184 - Ewen, John A. | 2005-07-28 |
Alpha olefin polymer products and catalyst systems Grant 6,872,790 - Ewen March 29, 2 | 2005-03-29 |
Process for the polymerization of alpha olefins Grant 6,649,712 - Ewen November 18, 2 | 2003-11-18 |
Metallocene compounds, process for their preparation and their use in catalytic systems for the polymerization of olefins Grant 6,635,779 - Ewen , et al. October 21, 2 | 2003-10-21 |
Method for varying the melting points and molecular weights of polyolefins using metallocene catalyst systems App 20020193537 - Ewen, John A. | 2002-12-19 |
Metallocene compounds, process for their preparation and their use in catalytic systems for the polymerization of olefins Grant 6,444,833 - Ewen , et al. September 3, 2 | 2002-09-03 |
Alpha olefin polymer products and catalyst systems App 20020111444 - Ewen, John A. | 2002-08-15 |
Open-pentadienyl metallocenes, precursors thereof and polymerization catalysts therefrom Grant 6,403,772 - Ewen , et al. June 11, 2 | 2002-06-11 |
Process for producing hemiisotactic polypropylene Grant 6,369,175 - Ewen April 9, 2 | 2002-04-09 |
Process and catalyst for producing isotactic polyolefins Grant 6,262,199 - Ewen , et al. July 17, 2 | 2001-07-17 |
Syndiotactic polypropylene Grant 6,184,326 - Razavi , et al. February 6, 2 | 2001-02-06 |
Stereospecific metallocene catalysts with stereolocking .alpha.-cp substituents Grant 6,180,732 - Ewen January 30, 2 | 2001-01-30 |
Process for polymerization of olefins with silicon bridged metallocene catalyst systems Grant 6,117,957 - Ewen September 12, 2 | 2000-09-12 |
Open-pentadienyl metallocenen ligands, polymerization catalysts/catalyst precursors and polymers therefrom Grant 6,069,237 - Ewen , et al. May 30, 2 | 2000-05-30 |
Process for olefin polymerization using metallocene catalysts with Lewis acids and aluminum alkyls Grant 5,883,202 - Ewen , et al. March 16, 1 | 1999-03-16 |
Metallocene catalyst systems Grant 5,846,896 - Ewen December 8, 1 | 1998-12-08 |
Method for controlling the melting points and molecular weights of syndiotactic polyolefins using metallocene catalyst systems Grant 5,710,222 - Ewen , et al. January 20, 1 | 1998-01-20 |
Method for controlling the melting points and molecular weights of syndiotactic polyolefins using metallocene catalyst systems Grant 5,688,735 - Ewen , et al. November 18, 1 | 1997-11-18 |
Catalyst and process for polymerization of olefins Grant 5,663,249 - Ewen , et al. September 2, 1 | 1997-09-02 |
Catalyst compounds for olefin polymerization Grant 5,633,394 - Welborn, Jr. , et al. May 27, 1 | 1997-05-27 |
Stereospecific metallocene catalysts with stereolocking .alpha.-CP substituents Grant 5,631,202 - Ewen May 20, 1 | 1997-05-20 |
Catalyst system using aluminum alkyl with ion-pair metallocene catalysts Grant 5,614,457 - Ewen , et al. March 25, 1 | 1997-03-25 |
Process and catalyst for polyolefin density and molecular weight control Grant 5,580,939 - Ewen , et al. December 3, 1 | 1996-12-03 |
Metallocene catalysts with lewis acids and aluminum alkyls Grant 5,561,092 - Ewen , et al. October 1, 1 | 1996-10-01 |
Addition of aluminum alkyl for improved metallocene catalyst Grant 5,519,100 - Ewen , et al. May 21, 1 | 1996-05-21 |
Syndiotactic polypropylene Grant 5,476,914 - Ewen , et al. December 19, 1 | 1995-12-19 |
Doubly-conformationally locked, stereorigid catalysts for the preparation of tactiospecific polymers Grant 5,459,117 - Ewen October 17, 1 | 1995-10-17 |
Process and catalyst for producing isotactic polyolefins Grant 5,416,228 - Ewen , et al. May 16, 1 | 1995-05-16 |
Process for using metallocene catalyst in a continuous reactor system Grant 5,393,851 - Ewen , et al. February 28, 1 | 1995-02-28 |
Preparation of metallocene catalysts for polymerization of olefins Grant 5,387,568 - Ewen , et al. February 7, 1 | 1995-02-07 |
Process for producing syndiotactic polyolefins Grant 5,334,677 - Razavi , et al. August 2, 1 | 1994-08-02 |
Process and catalyst for polyolefin density and molecular weight control Grant 5,324,800 - Welborn, Jr. , et al. June 28, 1 | 1994-06-28 |
Process and catalyst for producing syndiotactic polyolefins Grant 5,225,500 - Elder , et al. July 6, 1 | 1993-07-06 |
Process and catalyst for producing syndiotactic polyolefins Grant 5,155,080 - Elder , et al. * October 13, 1 | 1992-10-13 |
Efficiency of a pre-polymerized catalyst Grant 5,122,583 - Ewen , et al. June 16, 1 | 1992-06-16 |
Polymerization of olefins with an improved catalyst system using a new electron donor Grant 5,066,738 - Ewen November 19, 1 | 1991-11-19 |
Catalyst for producing hemiisotactic polypropylene Grant 5,036,034 - Ewen July 30, 1 | 1991-07-30 |
Catalyst systems for producing polyolefins having a broad molecular weight distribution Grant 4,975,403 - Ewen * December 4, 1 | 1990-12-04 |
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 |
Catalyst system for the polymerization of olefins Grant 4,927,797 - Ewen May 22, 1 | 1990-05-22 |
Process and catalyst for producing syndiotactic polyolefins Grant 4,892,851 - Ewen , et al. January 9, 1 | 1990-01-09 |
Hafnium metallocene catalyst for the polymerization of olefins Grant 4,794,096 - Ewen December 27, 1 | 1988-12-27 |
Catalyst pretreatment process Grant 4,767,735 - Ewen , et al. August 30, 1 | 1988-08-30 |
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 |
Isotactic-stereoblock polymers of alpha-olefins and process for producing the same Grant 4,522,982 - Ewen June 11, 1 | 1985-06-11 |