Patents by Inventor Warunee S. Sisson

Warunee S. Sisson 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).

  • Rosin-fatty acid vinylic emulsion compositions
    Patent number: 6429247
    Abstract: A rosin fatty acid vinylic emulsion composition produced by (A) polymerizing a mixture of vinylic monomers in the presence of a fatty acid rosin mixture comprising a mixture of fatty acids and rosin, at temperature in the range of about 135° C. to about 175° C., to produce a rosin-fatty acid vinylic polymer having a weight average molecular weight in the range of 4,000 to about 12,000; and (B) subsequently emulsion polymerizing another mixture of vinylic monomers in the presence of the rosin-fatty acid vinylic polymer of step A at temperature in the range of about 20° C. to about 100° C., to produce a rosin-fatty acid vinylic emulsion composition with polymers having a weight average molecular weight in the range of about 40,000 to about 200,000.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: August 6, 2002
    Assignee: Westvaco Corporation
    Inventors: Rajnikant Shah, Warunee S. Sisson, Thomas M. Sisson