Patents by Inventor Karen A. Nordquist

Karen A. Nordquist 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).

  • Quaternary modified acrylamide polymers
    Patent number: 4079027
    Abstract: A method for the preparation of quaternary modified acrylamide polymers is disclosed. Applicable to both solutions of acrylamide polymer and to water-in-oil emulsions of finely divided acrylamide polymer, the method involves reacting the acrylamide with a secondary amine formaldehyde adduct followed by quaternization with an alkylating agent and then, stabilization. The composition of these polymers is also disclosed.
    Type: Grant
    Filed: October 28, 1976
    Date of Patent: March 14, 1978
    Assignee: Nalco Chemical Company
    Inventors: Kenneth G. Phillips, Edward G. Ballweber, Karen A. Nordquist, Robert A. Miller
  • Quaternary modified acrylamide polymers
    Patent number: 4010131
    Abstract: A method for the preparation of quaternary modified acrylamide polymers is disclosed. Applicable to both solutions of acrylamide polymer and to water-in-oil emulsions of finely divided acrylamide polymer, the method involves reacting the acrylamide with a secondary amine formaldehyde adduct followed by quaternization with an alkylating agent and then, stabilization. The composition of these polymers is also disclosed.
    Type: Grant
    Filed: April 18, 1975
    Date of Patent: March 1, 1977
    Assignee: Nalco Chemical Company
    Inventors: Kenneth G. Phillips, Edward G. Ballweber, Karen A. Nordquist, Robert A. Miller