Donald R. Witt

Person

Bartlesville, OK, US

People

Patents Grantslast 30 patents

Information Patent Grant
Controlled addition of alkali or alkaline earth salts to a chromium...
- Patent number 5,444,132
- Issue date Aug 22, 1995
- Phillips Petroleum Company
- Donald R. Witt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Polymerization catalysts and processes
- Patent number 5,284,811
- Issue date Feb 8, 1994
- Phillips Petroleum Company
- Donald R. Witt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Olefin polymerization catalysts and preparation method
- Patent number 5,073,531
- Issue date Dec 17, 1991
- Phillips Petroleum Company
- Donald R. Witt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Polymerization using a support formed by heating silica gel in iner...
- Patent number 4,436,883
- Issue date Mar 13, 1984
- Phillips Petroleum Company
- Donald R. Witt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Polymerization process utilizing a catalyst prepared by aging of a...
- Patent number 4,436,882
- Issue date Mar 13, 1984
- Phillips Petroleum Company
- Donald R. Witt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Aging of chromium-containing gel at high pH
- Patent number 4,405,501
- Issue date Sep 20, 1983
- Phillips Petroleum Company
- Donald R. Witt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Heating silica gel in inert atmosphere before activation
- Patent number 4,392,990
- Issue date Jul 12, 1983
- Phillips Petroleum Company
- Donald R. Witt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Silica production
- Patent number 4,246,139
- Issue date Jan 20, 1981
- Phillips Petroleum Company
- Donald R. Witt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Catalyst support prepared by alcohol treatment of hydrogels
- Patent number 4,152,503
- Issue date May 1, 1979
- Phillips Petroleum Company
- James N. Short
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Continuous, multiple zone fluidized bed for particle treater
- Patent number 4,136,061
- Issue date Jan 23, 1979
- Phillips Petroleum Company
- John P. Hogan
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Catalyst support prepared by alcohol treatment of hydrogels
- Patent number 4,081,407
- Issue date Mar 28, 1978
- Phillips Petroleum Company
- James N. Short
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Polymerization of olefins
- Patent number 4,009,327
- Issue date Feb 22, 1977
- Phillips Petroleum Company
- Donald R. Witt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Reactivation of organochromium olefin polymerization catalyst in pr...
- Patent number 4,001,196
- Issue date Jan 4, 1977
- Phillips Petroleum Company
- Donald R. Witt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Olefin polymerization catalyst
- Patent number 3,974,101
- Issue date Aug 10, 1976
- Phillips Petroleum Company
- Donald R. Witt
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Catalyst support formed by adding acidic material to silica contain...
- Patent number 3,950,316
- Issue date Apr 13, 1976
- Phillips Petroleum Company
- Donald R. Witt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Large pore silica and polymerization catalyst
- Patent number 3,948,806
- Issue date Apr 6, 1976
- Phillips Petroleum Company
- Donald R. Witt
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Supported chromium oxide catalyst having mixed adjuvant
- Patent number 3,947,433
- Issue date Mar 30, 1976
- Phillips Petroleum Company
- Donald R. Witt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Donald R. Witt

Person

Patents Grantslast 30 patents

Controlled addition of alkali or alkaline earth salts to a chromium...

Polymerization catalysts and processes

Olefin polymerization catalysts and preparation method

Polymerization using a support formed by heating silica gel in iner...

Polymerization process utilizing a catalyst prepared by aging of a...

Aging of chromium-containing gel at high pH

Heating silica gel in inert atmosphere before activation

Silica production

Catalyst support prepared by alcohol treatment of hydrogels

Continuous, multiple zone fluidized bed for particle treater

Catalyst support prepared by alcohol treatment of hydrogels

Polymerization of olefins

Reactivation of organochromium olefin polymerization catalyst in pr...

Olefin polymerization catalyst

Catalyst support formed by adding acidic material to silica contain...

Large pore silica and polymerization catalyst

Supported chromium oxide catalyst having mixed adjuvant