Patents by Inventor Girish Chandra Barua

Girish Chandra Barua 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).

  • Non-ionic surfactants from water soluble copolymers of acrylamide with hydrophobic monomers
    Patent number: 4098987
    Abstract: Polymeric surfactants are copolymers of acrylamide with 30 - 60 wt. percent of acrylic esters or alkyl or alkoxymethyl acrylamides having molecular wt. from 800 to 10,000 amu.
    Type: Grant
    Filed: July 14, 1976
    Date of Patent: July 4, 1978
    Assignee: American Cyanamid Company
    Inventors: Girish Chandra Barua, Daniel Elmer Nagy
  • Emulsifiers useful for emulsion polymerization of vinyl monomers
    Patent number: 4081418
    Abstract: In the emulsion polymerization of polymers which comprise monomers selected from acrylic acid, methacrylic acid, alkyl esters of those acids and which may also comprise other compatible vinyl monomers such as styrene, vinyl acetate, N-methylolacrylamide, acrylonitrile, itaconic acid and the like, the emulsifier for the emulsion polymerization is a surface-active agent having the formula ##STR1## wherein ##STR2## is the acyl radical of a fatty acid having 7 to 21 carbon atoms and M is selected from ammonium, the alkali metals, and certain alkaline earth metals, and x is 1 to 3.
    Type: Grant
    Filed: May 10, 1976
    Date of Patent: March 28, 1978
    Assignee: American Cyanamid Company
    Inventors: Girish Chandra Barua, Herbert Burkhard