Patents by Inventor William R. Krumm

William R. Krumm 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).

  • Adsorption material and method
    Patent number: 5283123
    Abstract: Adsorption material, preferably substantially spherical, wherein support particles having cellulose capable of binding charged particles such as proteins, are distributed over the exterior surfaces thereof, and a method for generating substantially spherical adsorption material.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: February 1, 1994
    Inventors: Deborah H. Carter, Heikki Lommi, Richard L. Antrim, William R. Krumm, Gary W. Stuhlfauth
  • Rubber containing microencapsulated antidegradants
    Patent number: 4895884
    Abstract: There is disclosed the use of microencapsulated antidegradants in rubber and a process for the production of microencapsulated antidegradants. More specifically, this invention is directed to the cellulose acetate microencapsulation of para-phenylene diamine based antiozonants at wall to core ratios greater than 1:1 but less than 4:1. The microcapsules preferably have a particle diameter of less than 50 microns. The microencapsulated antidegradant prepared and used according to this invention provides long term protection to rubber articles that are subject to ozone and oxygen attack.
    Type: Grant
    Filed: October 6, 1987
    Date of Patent: January 23, 1990
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: David A. Benko, Larry R. Evans, James G. Gillick, Walter H. Waddell, Barbara A. Metz, Benjamin F. Benton, Gordon E. Pickett, William R. Krumm