Patents by Inventor Subhash V. Gangal

Subhash V. Gangal 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).

  • Low smoke and flame-resistant composition
    Patent number: 4963609
    Abstract: A low smoke and flame-resistant fluoropolymer composition, useful as insulation in a plenum cable and comprised of a base polymer of ethylene units, tetrafluoroethylene and/or chlorotrifluoroethylene units, and fluorine-containing, non-telogenic termonomer units; a metal oxide; and a polytetrafluoroethylene drip suppressant.
    Type: Grant
    Filed: November 1, 1989
    Date of Patent: October 16, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Jerrel C. Anderson, Subhash V. Gangal, Dewey L. Kerbow, Charles W. Stewart
  • Tetrafluoroethylene copolymers
    Patent number: 4792594
    Abstract: A tetrafluoroethylene copolymer composition in which the modifying comonomer is a fluorinated alkyl ethylene of the formula CF.sub.3 --CF.sub.2 --(CF.sub.2).sub.2 --CH.dbd.CH.sub.2.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: December 20, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Subhash V. Gangal, Satish C. Malhotra
  • Tetrafluoroethylene copolymers
    Patent number: 4636549
    Abstract: A tetrafluoroethylene copolymer composition in which the modifying comonomer is a fluorinated alkyl ethylene of the formulaCF.sub.3 (CF.sub.2).sub.3 CH.dbd.CH.sub.2,wherein the units of acid comonomers are located in the interior of the copolymer.
    Type: Grant
    Filed: May 31, 1985
    Date of Patent: January 13, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Subhash V. Gangal, Satish C. Malhotra
  • Tetrafluoroethylene polymer dispersions
    Patent number: 4370376
    Abstract: Tetrafluoroethylene polymer coating dispersions when coated on glass fabric improve acid resistance of the fabric if the dispersions contain a selected silane, siloxane and water repellant.
    Type: Grant
    Filed: August 27, 1981
    Date of Patent: January 25, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Subhash V. Gangal, Allan H. Olson
  • Process for preparing aqueous dispersion of polytetrafluoroethylene
    Patent number: 4342675
    Abstract: Polytetrafluoroethylene dispersions obtained from dispersion polymerization which have high solids content and small polytetrafluoroethylene particles are obtained by employing a combination of disuccinic acid peroxide and an inorganic persulfate, and a combination of an anionic and a hydrocarbon dispersing agent, precharged to the polymerization mixture, and by adding a combination of disuccinic acid peroxide and an anionic dispersing agent during the course of the polymerization.
    Type: Grant
    Filed: June 16, 1978
    Date of Patent: August 3, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Subhash V. Gangal
  • Process for reducing adhesions during suspension polymerization
    Patent number: 4189551
    Abstract: Presence of a selected carboxylic acid in the aqueous polymerization mixture during suspension polymerization of tetrafluoroethylene has been found to reduce the amount of adhesions formed during the polymerization.
    Type: Grant
    Filed: June 19, 1978
    Date of Patent: February 19, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Subhash V. Gangal
  • Process for obtaining colloidal dispersion of polymeric tetrafluoroethylene
    Patent number: 4186121
    Abstract: Presence of a selected carboxylic acid in the aqueous polymerization mixture during polymerization of tetrafluoroethylene to obtain a colloidal dispersion of polymeric tetrafluoroethylene has been found to reduce the amount of coagulum formed during the polymerization.
    Type: Grant
    Filed: June 19, 1978
    Date of Patent: January 29, 1980
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: Subhash V. Gangal