Patents by Inventor Rajendra Kashinath Singh

Rajendra Kashinath Singh 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).

  • Transparent, fire-resistant polycarbonate compositions
    Publication number: 20030027905
    Abstract: A transparent, fire resistant branched polycarbonate-polysiloxane composition comprises polycarbonate, a short-chained polydiorganosiloxane, a branching agent, and flame retardants essentially free of bromine or chlorine, wherein the amount of short-chained polydiorganosiloxane is about 1 wt. % or less.
    Type: Application
    Filed: July 18, 2001
    Publication date: February 6, 2003
    Applicant: General Electric Company
    Inventors: James Alan Mahood, Niles Richard Roscnquist, Rajendra Kashinath Singh
  • Translucent flame retardant polycarbonate compositions
    Patent number: 6462111
    Abstract: A fire retardant polycarbonate composition comprises branched polycarbonate resin, polytetrafluoroethylene, a fire retardant free of bromine and chlorine, and an optional siloxane.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: October 8, 2002
    Assignee: General Electric Company
    Inventors: Rajendra Kashinath Singh, Niles Richard Rosenquist, John Michael Fischer
  • Method for reducing haze in a fire resistant polycarbonate composition
    Publication number: 20020123544
    Abstract: A method to reduce haze in the production of fire resistant polycarbonate compositions comprising flame retardant salts, wherein the salt is blended with a first polycarbonate to form a concentrate, and the concentrate is then added to a second polycarbonate resin.
    Type: Application
    Filed: December 27, 2000
    Publication date: September 5, 2002
    Inventors: Eric Thomas Gohr, Niles Richard Rosenquist, Rajendra Kashinath Singh, Gregory James Stoddard, Shahrzad Zarkoob, Johannes Martinus Dina Goossens
  • Fire-retarded polycarbonate resin composition
    Patent number: 6353046
    Abstract: Improved fire-retarded properties can be imparted to polycarbonate resin composition by incorporating into the polycarbonate a fire-retardant component containing a perfluoroallkane sulfonate such as potassium perfluorobutane sulfonate and a cyclic siloxane such as octaphenylcyclotetrasiloxane. The fire-retardant component is suitably added at levels to form a polycarbonate composition in which the perfluoroalkane sulfonate is present in an amount of from 0.02 to 0.1 phr relative to the composition as a whole, and the cyclic siloxane is present in an amount of at least 0.02 relative to the composition as a whole.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: March 5, 2002
    Assignee: General Electric Company
    Inventors: Niles Richard Rosenquist, Rajendra Kashinath Singh, Jeffrey Hayward Wengrovius