Patents by Inventor John J. Duncan

John J. Duncan 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).

  • Technology for the production of inverse emulsion polymers
    Patent number: 4539368
    Abstract: A process for preparing a water-in-oil emulsion of an anionic polymer which comprises emulsion polymerizing an anionic monomer in a water-in-oil emulsion containing a mixture of anionic and nonionic surfactants.
    Type: Grant
    Filed: July 26, 1984
    Date of Patent: September 3, 1985
    Assignee: AZS Corporation
    Inventors: John J. Duncan, Andrejs Zvejnieks
  • Textile soil release composition and method
    Patent number: 4045172
    Abstract: Compositions, and methods for manufacture thereof, which impart an effective soil release finish to textiles of polyester-containing cellulosic fibers, comprising certain partial alkyl and alkoxyalkyl esters and mixed esters of interpolymers of maleic anhydride with unsaturated compounds, such as styrene and ethylene, and with polyvinyl alkyl ethers in which the weight percentage of esterified interpolymer is critical.
    Type: Grant
    Filed: April 1, 1975
    Date of Patent: August 30, 1977
    Assignee: GAF Corporation
    Inventors: John J. Duncan, Alexander Kirjanov