Patents by Inventor Kalyan K. Ganguli

Kalyan K. Ganguli 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).

  • Patent number: 5116421
    Abstract: A fluid loss control additive for use in well cementing operations wherein the downhole temperature ranges from about 200.degree. to about 500.degree. F. The additive is a polymer comprised of 2-acrylamido-2-methyl propane-3-sulphonic acid, N-vinyl,-N-methylacetamide, in the presence or absence of arcylamide. This additive is also effective in saltwater cement slurries.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: May 26, 1992
    Assignee: The Western Company of North America
    Inventor: Kalyan K. Ganguli
  • Patent number: 5099922
    Abstract: This invention involves cementing compositions for the oil industry and their use in cementing wells. More specifically, this invention involves the control of the gas migration or gas channeling phenomenon that occurs during the setting of a cement slurry. A cementing composition, capable of inhibiting gas channeling, comprised of gaseous fluid, hydraulic cement, and a gas channeling inhibiting additive comprised of a copolymer 2-acrylamido-2 methylpropane-3-sulphonic acid, N-vinylacylamide and acrylamide, is provided.
    Type: Grant
    Filed: March 26, 1991
    Date of Patent: March 31, 1992
    Assignee: The Western Company of North America
    Inventor: Kalyan K. Ganguli
  • Patent number: 4348506
    Abstract: Curable compositions which cure into bubble-free articles include as a resinous component, a vinyl ester resin, a ketone peroxide as a catalyst and as a promoter (a) a complex of equivalent amounts of a cobalt salt and an aldimine chelating agent which is the reaction product of equivalent amounts of salicylaldehyde and a polyamine or (b) cobalt naphthenate and about an equivalent amount of aldimine chelating agent which is the reaction product of salicylaldehyde and a polyamine or (c) a combination of (a) and (b).
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: September 7, 1982
    Assignee: The Dow Chemical Company
    Inventors: Kalyan K. Ganguli, David A. Wilson