Patents by Inventor Martin C. Cadmus

Martin C. Cadmus 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).

  • Heat-stable, salt-tolerant microbial xanthanase
    Patent number: 4996153
    Abstract: A novel mixed bacterial culture isolated from soil by enrichment culture techniques produces a xanthanase enzyme complex which is stable to 65.degree. C. in the presence of salt. These properties render the heat-stable, salt-tolerant zanthanase useful for in situ degradation of xanthan gum in petroleum recovery fluids and other thickened industrial brines.
    Type: Grant
    Filed: August 29, 1989
    Date of Patent: February 26, 1991
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Martin C. Cadmus, Morey E. Slodki
  • Heat-stable, salt-tolerant microbial xanthanase
    Patent number: 4886746
    Abstract: A novel mixed bacterial culture isolated from soil by enrichment culture techniques produces a xanthanase enzyme complex which is stable to 65.degree. C. in the presence of salt. These properties render the heat-stable, salt-tolerant xanthanase useful for in situ degradation of xanthan gum in petroleum recovery fluids and other thickened industrial brines.
    Type: Grant
    Filed: May 10, 1988
    Date of Patent: December 12, 1989
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Martin C. Cadmus, Morey E. Slodki
  • Salt-tolerant microbial xanthanase and method of producing same
    Patent number: 4410625
    Abstract: A novel Bacillus isolated from the soil is unique in its capacity to produce xanthanase, and is especially productive of the enzyme when cultured in the presence of other soil organisms. Both crude and purified xanthanases recovered from the fermentation broth effectively degrade xanthan gum. Moreover, tolerance of the Bacillus to sodium chloride levels as high as about 4%, render it useful for the in situ degradation of the heteropolysaccharide in petroleum recovery fluids and other thickened industrial brines.
    Type: Grant
    Filed: February 4, 1982
    Date of Patent: October 18, 1983
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventor: Martin C. Cadmus
  • Production of high-pyruvate xanthan gum on synthetic medium
    Patent number: 4394447
    Abstract: A high-pyruvate xanthan gum, substantially free of insolubles and undesirable coloration, is produced by fermentation of Xanthomonas campestris on a carbohydrate-containing nutrient medium having (NH.sub.4).sub.2 HPO.sub.4 at a level of at least 0.15% as the primary nitrogen source, and having a total phosphate level of at least about 0.25%.
    Type: Grant
    Filed: May 23, 1978
    Date of Patent: July 19, 1983
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Martin C. Cadmus, Clarence A. Knutson, Jr.