Patents by Inventor Kenneth R. Yahl

Kenneth R. Yahl 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: 4726809
    Abstract: A novel starch used in a size composition is disclosed. The novel starch is a quaternary ammonium ether and acyl ester of starch which has a DS of quaternary ammonium ether of between 0.02 to 0.2 and a DS of acyl ester of between 0.01 to 0.3. The size composition is made from the novel starch and polyvinyl alcohol in a ratio of starch: polyvinyl alcohol of between 1:9 to 10:0. The method of making the size composition and the method of applying the size composition to the yarn is disclosed.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: February 23, 1988
    Assignee: American Maize-Products Company
    Inventors: Edward D. DeBoer, Kenneth R. Yahl
  • Patent number: 4552564
    Abstract: An improved size composition of a modified starch and polyvinyl alcohol especially useful as a textile size is disclosed. The modified starch is a hydroxyalkyl and tertiary amino alkyl starch with a D.S. of aminoalkyl groups between 0.02 to 0.30 and a M.S. of hydroxypropyl groups between 0.02 and 0.50. The ratio of polyvinyl alcohol: modified starch in the size composition varies between 1:9 and 9:1. The method of applying the size composition to yarn and the method of making the size composition are also disclosed. High amylose starch, as compared to common or waxy, is the preferred starch.
    Type: Grant
    Filed: July 27, 1984
    Date of Patent: November 12, 1985
    Assignee: American Maise-Products Company
    Inventors: Edward D. DeBoer, Kenneth R. Yahl
  • Patent number: 4277411
    Abstract: An improved method for extracting oil from oil-bearing vegetable materials is disclosed. The method comprises forming a particulate vegetable material containing between about 20% and about 55% water by weight, drying the particulate vegetable material to a moisture content of less than about 15% by weight and then extracting the dried material with an oil solvent.
    Type: Grant
    Filed: November 19, 1979
    Date of Patent: July 7, 1981
    Assignee: CPC International Inc.
    Inventor: Kenneth R. Yahl