Patents by Inventor Vithal C. Patel

Vithal C. Patel 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).

  • Flame retardant regenerated cellulose filaments containing cross-linked polymeric phosphazenes
    Patent number: 4111701
    Abstract: Flame-retarded regenerated cellulose filaments and filamentary articles having dispersed therein polymeric phosphazenes with P-O-P oxygen linkages that are prepared through the condensation of alkyl esters of phosphorus acids with acid halides of phosphorus acids with elimination of alkyl halides; and method for their preparation.
    Type: Grant
    Filed: October 1, 1976
    Date of Patent: September 5, 1978
    Assignee: Avtex Fibers Inc.
    Inventors: Borivoj Richard Franko-Filipasic, Edward F. Orwoll, Vithal C. Patel
  • Polymeric phosphazenes and process for preparation
    Patent number: 3994996
    Abstract: A new class of polymeric phosphazenes with P--O--P oxygen linkages useful in rendering rayon flame retardant are prepared through the condensation of alkyl esters of phosphorus acids with acid halides of phosphorus acids with elimination of alkyl halides.
    Type: Grant
    Filed: April 5, 1974
    Date of Patent: November 30, 1976
    Assignee: FMC Corporation
    Inventors: Borivoj Richard Franko-Filipasic, Edward F. Orwoll, Vithal C. Patel