Patents by Inventor Donald R. Kelsey

Donald R. Kelsey 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).

  • Process for flocculating an aqueous suspension of particles with quaternary ammonium graft copolymers
    Patent number: 4305829
    Abstract: Described herein is a process for flocculating an aqueous suspension of finely divided particles which comprises treating the suspension with an effective amount of a water-soluble graft copolymer to achieve the desired degree of flocculation of said particles, said water soluble graft copolymer being comprised of polymeric units characterized by the general formula: ##STR1## wherein n, y and z represent the relative molar equivalent fractions of each of the respective polymeric units in the graft copolymer, the sum of n, y and z being 1.0, the value of n varying from 0.00 to 0.99, the value of y varying from 0.00 to 0.99 and the value of z varying from 0.01 to 0.
    Type: Grant
    Filed: June 5, 1980
    Date of Patent: December 15, 1981
    Assignee: Union Carbide Corporation
    Inventors: Donald R. Kelsey, Russell L. Kreeger
  • Quaternary ammonium graft copolymers for use as flocculants and method of preparing same
    Patent number: 4271053
    Abstract: This invention relates to quaternary ammonium graft copolymers comprised of polymeric units characterized by the general formula: ##STR1## wherein n, y and z represent the relative molar equivalent fractions of each of the respective polymeric units in the graft copolymer, the sum of n, y and z being 1.0, the value of n varying from 0.00 to 0.99, the value of y varying from 0.00 to 0.99 and the value of z varying from 0.01 to 0.
    Type: Grant
    Filed: June 29, 1979
    Date of Patent: June 2, 1981
    Assignee: Union Carbide Corporation
    Inventors: Donald R. Kelsey, Russell L. Kreeger
  • Preparation of di-tertiary peroxides
    Patent number: 4198528
    Abstract: The reaction rates for the interaction of tertiary hydroperoxides with tertiary alcohols to afford di-tertiary peroxides are increased by carrying out the reaction in the presence of a carboxylic acid anhydride.
    Type: Grant
    Filed: January 25, 1978
    Date of Patent: April 15, 1980
    Assignee: Union Carbide Corporation
    Inventor: Donald R. Kelsey