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Timothy S. Stevens
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Midland, MI, US
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last 30 patents
Information
Patent Grant
High performance anion-exchange chromatographic packing composition...
Patent number
4,927,539
Issue date
May 22, 1990
The Dow Chemical Company
Timothy S. Stevens
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Method for reagent addition to a flowing liquid carrier stream
Patent number
4,837,161
Issue date
Jun 6, 1989
The Dow Chemical Company
Timothy S. Stevens
G01 - MEASURING TESTING
Information
Patent Grant
Apparatus for membrane-permeation separations using segmented flow
Patent number
4,834,877
Issue date
May 30, 1989
The Dow Chemical Company
Thomas L. Peters
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Chromatography columns with cast porous plugs and methods of fabric...
Patent number
4,793,920
Issue date
Dec 27, 1988
Lee Scientific, Inc.
Hernan Cortes
G01 - MEASURING TESTING
Information
Patent Grant
Liquid chromatographic method and apparatus with a packed tube memb...
Patent number
4,751,004
Issue date
Jun 14, 1988
The Dow Chemical Company
Timothy S. Stevens
G01 - MEASURING TESTING
Information
Patent Grant
Determining organic compounds using a membrane
Patent number
4,715,217
Issue date
Dec 29, 1987
The Dow Chemical Company
Brenton S. Coyne
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Apparatus and method for the determination of water by liquid chrom...
Patent number
4,696,904
Issue date
Sep 29, 1987
The Dow Chemical Company
Timothy S. Stevens
G01 - MEASURING TESTING
Information
Patent Grant
Apparatus and method for membrane-permeation separations using segm...
Patent number
4,684,470
Issue date
Aug 4, 1987
The Dow Chemical Company
Thomas L. Peters
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Indirect-photometric chromatography done in and with a variable cap...
Patent number
4,629,705
Issue date
Dec 16, 1986
The Dow Chemical Company
Hernan J. Cortes
G01 - MEASURING TESTING
Information
Patent Grant
High performance analytical column for anion determination
Patent number
4,519,905
Issue date
May 28, 1985
The Dow Chemical Company
Timothy S. Stevens
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Ion analysis method and apparatus
Patent number
4,474,664
Issue date
Oct 2, 1984
The Dow Chemical Company
Timothy S. Stevens
G01 - MEASURING TESTING
Information
Patent Grant
High performance anion-exchange chromatographic packing composition
Patent number
4,383,047
Issue date
May 10, 1983
The Dow Chemical Company
Timothy S. Stevens
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
High performance ion-exchange composition
Patent number
4,351,909
Issue date
Sep 28, 1982
The Dow Chemical Co.
Timothy S. Stevens
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Analytical method for determining acid/salt and base/salt species c...
Patent number
4,290,775
Issue date
Sep 22, 1981
The Dow Chemical Co.
Timothy S. Stevens
G01 - MEASURING TESTING
Information
Patent Grant
Analytical technique for quantitating acid/salt and base/salt sampl...
Patent number
4,199,323
Issue date
Apr 22, 1980
The Dow Chemical Company
Theodore E. Miller
G01 - MEASURING TESTING
Information
Patent Grant
High performance ion exchange composition
Patent number
4,101,460
Issue date
Jul 18, 1978
The Dow Chemical Company
Hamish Small
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Chromatographic apparatus for analysis of ionic species
Patent number
4,017,262
Issue date
Apr 12, 1977
The Dow Chemical Company
Hamish Small
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
High performance, cation-exchange chromatography on surface-sulfona...
Patent number
3,966,596
Issue date
Jun 29, 1976
The Dow Chemical Company
Timothy S. Stevens
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL