Patents by Inventor Raymond Thomas Leibfried

Raymond Thomas Leibfried 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).

  • Paper having improved strength characteristics and process for making same
    Patent number: 6179962
    Abstract: Process for making paper having improved strength characteristics by adding to the pulp water-soluble and/or water-dispersible cationic polymer and oxidized galactose type of alcohol configuration containing polymer.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: January 30, 2001
    Assignee: Hercules Incorporated
    Inventors: Richard Lee Brady, Raymond Thomas Leibfried, Sr., Tuyen Thanh Nguyen
  • Oxidation in solid state of oxidizable galactose type of alchohol configuration containing polymer
    Patent number: 6124124
    Abstract: Composition comprising oxidizable galactose type of alcohol configuration containing polymer (such as guar) which is in solid state and galactose oxidase. Application of such oxidized polymers in the papermaking process results in superior paper strength characteristics.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: September 26, 2000
    Assignee: Hercules Incorporated
    Inventors: Richard Lee Brady, Raymond Thomas Leibfried, Sr., Tuyen Thanh Nguyen
  • Use of oxidation promoting chemicals in the oxidation oxidizable galactose type of alcohol configuration containing polymer
    Patent number: 6022717
    Abstract: Process for the oxidation of the oxidizable galactose type of alcohol in oxidizable galactose type of alcohol configuration containing polymer, such as guar, with galactose oxidase in the presence of oxidation promoting chemicals.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: February 8, 2000
    Assignee: Hercules Incorporated
    Inventors: Richard Lee Brady, Raymond Thomas Leibfried, Sr.
  • Lubricating oil base stock
    Patent number: 3947369
    Abstract: Disclosed is a synthetic oil useful as a base stock for jet engine lubricating oils. The initial viscosity of the synthetic oil at 210.degree.F. is 5.0-5.5 centistokes and at -40.degree.F. is less than 13,000 centistokes. Furthermore, it does not freeze when held at -40.degree.F. for 72 hours. The oil comprises a blend of (1) a pentaerythritol ester product consisting essentially of pentaerythritol material completely esterified by straight chain C.sub.4 -C.sub.10 alkanoic acid material, and (2) a trimellitate ester product consisting essentially of trimellitic acid completely esterified by C.sub.4 -C.sub.13 alkanol material. The weight ratio of the trimellitate ester product to the pentaerythritol ester product is generally in the range from about 1:10 to about 1:1.
    Type: Grant
    Filed: February 15, 1972
    Date of Patent: March 30, 1976
    Assignee: Hercules Incorporated
    Inventor: Raymond Thomas Leibfried