Patents by Inventor Vilas L. Wermers

Vilas L. Wermers 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).

  • High temperature drilling fluid component
    Patent number: 4652384
    Abstract: What is disclosed is a cross-linked starch which provides better fluid loss control in well drilling fluids than conventional starches at elevated temperatures. The starch may be derived from any source.
    Type: Grant
    Filed: August 30, 1984
    Date of Patent: March 24, 1987
    Assignee: American Maize-Products Company
    Inventors: H. Paul Francis, Edward D. DeBoer, Vilas L. Wermers
  • Malto-dextrins of improved stability prepared by enzymatic hydrolysis of oxidized starch
    Patent number: 3974033
    Abstract: There is disclosed malto-dextrins having a D.E. not substantially above about 20, prepared by the enzymatic hydrolysis of oxidized starch. Syrups of the malto-dextrins are capable of remaining haze-free for long periods of time at high solids concentrations. The malto-dextrins are prepared by first liquefying a highly oxidized starch with an acid or an enzyme to a D.E. not substantially above about 7, and in a subsequent step, converting the oxidized and liquefied starch with a bacterial alpha-amylase enzyme preparation to achieve a malto-dextrin product having a D.E. not substantially above about 20.
    Type: Grant
    Filed: September 12, 1975
    Date of Patent: August 10, 1976
    Assignee: CPC International Inc.
    Inventors: Clarence F. Harjes, Vilas L. Wermers