William C Wernau

US Patent:

42962030, Oct 20, 1981

Filed:

Nov 15, 1977

Appl. No.:

5/851757

Inventors:

William C. Wernau - Groton CT

Assignee:

Pfizer Inc. - New York NY

International Classification:

C12P 1906
C12N 1500
C12N 120
C12R 164

US Classification:

435104

Abstract:

A mutant strain of the genus Xanthomonas produces a pyruvate-free biopolymer. This biopolymer and the deacetylated form of this new biopolymer provide mobility control solutions which are especially useful for enhanced oil recovery where high brine applications are involved. The mobility control solutions of the present invention may be made from whole or filtered fermentation broth containing the pyruvate-free biopolymer or its deacetylated form. Alternatively, the biopolymer or its deacetylated form may be recovered from the broth and the recovered product used to form the desired mobility control solutions.

US Patent:

43406785, Jul 20, 1982

Filed:

Jan 5, 1981

Appl. No.:

6/222388

Inventors:

William C. Wernau - Groton CT

Assignee:

Pfizer Inc. - New York NY

International Classification:

C12N 120
C12P 1906
C12R 164

US Classification:

435253

Abstract:

A mutant strain of the genus Xanthomonas produces a pyruvate-free biopolymer. This biopolymer and the deacetylated form of this new biopolymer provide mobility control solutions which are especially useful for enhanced oil recovery where high brine applications are involved. The mobility control solutions of the present invention may be made from whole or filtered fermentation broth containing the pyruvate-free biopolymer or its deacetylated form. Alternatively, the biopolymer or its deacetylated form may be recovered from the broth and the recovered product used to form the desired mobility control solutions.

US Patent:

42823218, Aug 4, 1981

Filed:

Oct 9, 1979

Appl. No.:

6/080195

Inventors:

William C. Wernau - Groton CT

Assignee:

Pfizer, Inc. - New York NY

International Classification:

C12P 1906
C12R 164

US Classification:

435104

Abstract:

Increased xanthan concentrations are obtained in Xanthomonas fermentations by the gradual addition of a source of assimilable carbon, preferably glucose, to the aqueous nitrient medium during the course of the fermentation cycle.

US Patent:

41195469, Oct 10, 1978

Filed:

May 3, 1977

Appl. No.:

5/793274

Inventors:

William C. Wernau - Groton CT

Assignee:

Pfizer Inc. - New York NY

International Classification:

E21B 4320
C12B 100
C12D 1304

US Classification:

252 855D

Abstract:

A process is disclosed for preparing a Xanthomonas colloid-containing fermentation broth suitable for the preparation of mobility control solution used in oil recovery which comprises aerobically fermenting a Xanthomonas organism in an aqueous nutrient medium whose ingredients comprise a carbohydrate, a nitrogen source, an assimilable Krebs cycle acid, chelated calcium and trace elements, whereby the whole broth produced provides mobility control solutions of about 100 to 3000 ppm of Xanthomonas colloid which are substantially free of insoluble matter having a particle size greater than about 3 microns.

US Patent:

43527418, Oct 5, 1982

Filed:

Jun 2, 1981

Appl. No.:

6/269681

Inventors:

William C. Wernau - Groton CT

Assignee:

Pfizer Inc. - New York NY

International Classification:

E21B 4322

US Classification:

252 855D

Abstract:

A mutant strain of the genus Xanthomonas produces a pyruvate-free biopolymer. This biopolymer and the deacetylated form of this new biopolymer provide mobility control solutions which are especially useful for enhanced oil recovery where high brine applications are involved. The mobility control solutions of the present invention may be made from whole or filtered fermentation broth containing the pyrvuate-free biopolymer or its deacetylated form. Alternatively, the biopolymer or its deacetylated form may be recovered from the broth and the recovered product used to form the desired mobility control solutions.

US Patent:

46393226, Jan 27, 1987

Filed:

Aug 27, 1984

Appl. No.:

6/644593

Inventors:

Donald Beck - Ledyard CT
James W. Miller - Mystic CT
William C. Wernau - Groton CT
Thomas B. Young - North Stonington CT

Assignee:

Pfizer Inc. - New York NY

International Classification:

E21B 4322

US Classification:

252 8554

Abstract:

Biopolymers comprising xanthomonas and methylene bis (thiocyanate) are disclosed.