Patents by Inventor William C. Wernau

William C. Wernau has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4639322
    Abstract: Biopolymers comprising xanthomonas and methylene bis (thiocyanate) are disclosed.
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: January 27, 1987
    Assignee: Pfizer Inc.
    Inventors: Donald Beck, James W. Miller, William C. Wernau, Thomas B. Young, III
  • Patent number: 4352741
    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.
    Type: Grant
    Filed: June 2, 1981
    Date of Patent: October 5, 1982
    Assignee: Pfizer Inc.
    Inventor: William C. Wernau
  • Patent number: 4340678
    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.
    Type: Grant
    Filed: January 5, 1981
    Date of Patent: July 20, 1982
    Assignee: Pfizer Inc.
    Inventor: William C. Wernau
  • Patent number: 4296203
    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.
    Type: Grant
    Filed: November 15, 1977
    Date of Patent: October 20, 1981
    Assignee: Pfizer Inc.
    Inventor: William C. Wernau
  • Patent number: 4282321
    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.
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: August 4, 1981
    Assignee: Pfizer, Inc.
    Inventor: William C. Wernau
  • Patent number: 4119546
    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.
    Type: Grant
    Filed: May 3, 1977
    Date of Patent: October 10, 1978
    Assignee: Pfizer Inc.
    Inventor: William C. Wernau