Patents by Inventor John E. Hostettler

John E. Hostettler 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).

  • Suspending medium for particulate material
    Patent number: 5631313
    Abstract: A new stable liquid suspension of a non soluble particulate material, and a method of preparation of same are provided. Such compositions comprise at least one oil, one oil soluble resin and a non oil soluble particulate material mixed together In the appropriate quantities and conditions.
    Type: Grant
    Filed: November 14, 1991
    Date of Patent: May 20, 1997
    Assignee: Phillips Petroleum Company
    Inventors: Marshall D. Bishop, John E. Hostettler
  • Suspending medium for water soluble polymer
    Patent number: 5091448
    Abstract: A new stable liquid suspension of water soluble polymer, and a method of preparation are provided. Such compositions comprise of at least an iso-parrafinic oil medium, one styrene/isoprene copolymer, a water soluble polymer and preferably some hydrophobic fumed silica mixed together in the appropriate quantities and conditions.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: February 25, 1992
    Assignee: Phillips Petroleum Company
    Inventors: John E. Hostettler, Marshall D. Bishop