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John G. Hefner
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Lake Jackson, TX, US
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last 30 patents
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Patent Grant
Catalyst for the preparation of linear carbon monoxide/alpha-olefin...
Patent number
5,565,547
Issue date
Oct 15, 1996
The Dow Chemical Company
John G. Hefner
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Catalyst for the preparation of linear carbon monoxide/alpha-olefin...
Patent number
5,554,777
Issue date
Sep 10, 1996
The Dow Chemical Compamy
John G. Hefner
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Homogeneous catalysts and olefin polymerization process
Patent number
5,312,938
Issue date
May 17, 1994
The Dow Chemical Company
John G. Hefner
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for preparation of syndiotactic polystyrene
Patent number
5,196,490
Issue date
Mar 23, 1993
The Dow Chemical Company
Richard E. Campbell
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Homogeneous catalysts and olefin polymerization process
Patent number
5,194,532
Issue date
Mar 16, 1993
The Dow Chemical Company
John G. Hefner
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Catalyst and process for preparation of syndiotactic polystyrene
Patent number
5,045,517
Issue date
Sep 3, 1991
The Dow Chemical Company
Richard E. Campbell
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Catalysts prepared from tetrakis(dialkylamide or diarylamide) deriv...
Patent number
4,956,323
Issue date
Sep 11, 1990
The Dow Chemical Company
John G. Hefner
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Catalysts prepared from tetrakis(dialkylamide or diarylamide) deriv...
Patent number
4,892,914
Issue date
Jan 9, 1990
The Dow Chemical Company
John G. Hefner
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...