Patents by Inventor Jan E. Boevink

Jan E. Boevink 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).

  • Cationic block copolymers
    Patent number: 4347339
    Abstract: Water soluble cationic block copolymer comprising at least one first polymer block selected from a first class consisting of polymeric species having amino groups in the polymeric structure thereof wherein a majority of said amino groups are quaternary, and at least one second polymer block selected from a second class consisting of polymer species having amino groups in the polymeric structure thereof wherein a majority of said amino groups are other than quaternary amino acids. Also included are the methods of making these copolymers.
    Type: Grant
    Filed: May 8, 1981
    Date of Patent: August 31, 1982
    Assignee: Nalco Chemical Company
    Inventors: Jan E. Boevink, Arthur P. Derrick, John A. Moodie