Patents by Inventor Karl H. O. Tiefenthaler

Karl H. O. Tiefenthaler 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).

  • Water soluble guar product and method for making it
    Patent number: 4320226
    Abstract: A water-soluble guar product is obtained by reacting guar gum with an aqueous phosphate solution and oxidizing the product in the presence of alkali. These two process stages can also be combined into a one-stage process. The desired product is also obtained by reaction of an already partially depolymerized guar gum with aqueous phosphate solution. The product whose viscosity in aqueous solution can be set very accurately is used as thickening agent, particularly in the paper industry.
    Type: Grant
    Filed: October 9, 1980
    Date of Patent: March 16, 1982
    Assignee: Meyhall Chemical A.G.
    Inventors: Karl H. O. Tiefenthaler, Ulrich Wyss
  • Phosphated locust bean gums
    Patent number: 4162925
    Abstract: Phosphated locust bean gum is cold water soluble and does not require heat or high shear to form viscous solutions in water. Blends of phosphated locust bean gum and xanthan gums are also cold water soluble and such blends will form highly viscous gels in water without the application of heat or high shear agitation. Such gels are useful as suspending media for a variety of materials, e.g., seeds used in fluid drilling planting operations.
    Type: Grant
    Filed: May 10, 1978
    Date of Patent: July 31, 1979
    Assignee: Meyhall Chemical AG
    Inventors: Karl H. O. Tiefenthaler, Erich W. K. Nittner