Patents by Inventor Roger S. Stringham

Roger S. Stringham 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).

  • Process for imparting flame retardancy to fabrics
    Patent number: 4430089
    Abstract: A process for effecting flame retardation of fibrous structures, such as fabrics, particularly fabrics made from mixtures of natural and synthetic fibers, such as cotton and nylon. The process includes the steps of contacting the fabric to be treated with halomonomers and/or inorganic salts, followed by fluorocarbon grafting, and then by photohalogenation. The aforesaid treatment results in fabrics which are not only flame resistant but also have improved hand, manifested by softness, silkiness, and unwettability of the resulting fabric.
    Type: Grant
    Filed: April 14, 1982
    Date of Patent: February 7, 1984
    Assignee: Science Applications, Inc.
    Inventors: Madeline S. Toy, Roger S. Stringham
  • Copolymers from octafluoronaphthalene
    Patent number: 4393198
    Abstract: A method for polymerizing octafluoronaphthalene and the resulting perfluorocompounds prepared therefrom. Polymerization is accomplished by reacting the octafluoronaphthalene monomer with a mono or difluoroxyperfluoroalkane.
    Type: Grant
    Filed: September 30, 1981
    Date of Patent: July 12, 1983
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Madeline S. Toy, Roger S. Stringham
  • Perfluorocompounds
    Patent number: 4321359
    Abstract: A method for polymerizing octafluoronaphthalene and the resulting perfluorocompounds prepared therefrom. Polymerization is accomplished by reacting the octafluoronaphthalene monomer with a mono or difluoroxyperfluoroalkane.
    Type: Grant
    Filed: August 29, 1980
    Date of Patent: March 23, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Madeline S. Toy, Roger S. Stringham
  • Method and means for producing fluorocarbon finishes on fibrous structures
    Patent number: 4278703
    Abstract: An improved process and apparatus is provided for imparting chemically bonded fluorocarbon finishes to textiles. In the process, the textiles are contacted with a gaseous mixture of fluoroolefins in an inert diluent gas in the presence of ultraviolet light under predetermined conditions.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: July 14, 1981
    Assignee: Science Applications, Inc.
    Inventors: Madeline S. Toy, Roger S. Stringham, Lawrence C. Fogg
  • Vitra-violet process for producing flame resistant polyamides and products produced thereby
    Patent number: 4203723
    Abstract: A process for producing aromatic polyamides having improved nonflammability characteristics in which a polyamide substrate is contacted with a gaseous medium comprising a minor amount of a haloolefinic material and an inert diluent in the presence of light having sufficient energy to effect chemical addition of the haloolefin to said polyamide substrate.
    Type: Grant
    Filed: December 6, 1976
    Date of Patent: May 20, 1980
    Inventors: James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher, Madeline S. Toy, Roger S. Stringham
  • Perfluoroethers
    Patent number: 4149016
    Abstract: A method for synthesizing perfluoropolyethers by effecting addition reactions under low temperature photolysis between perfluoroolefins, perfluorodialkyl peroxides and fluoroxyperfluoroalkanes resulting in the snythesis of new compounds.
    Type: Grant
    Filed: November 16, 1977
    Date of Patent: April 10, 1979
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Madeline S. Toy, Roger S. Stringham
  • Method for the preparation of perfluoroethers
    Patent number: 4077857
    Abstract: A method for synthesizing perfluoropolyethers by effecting addition reactions under low temperature photolysis between perfluoroolefins, perfluorodialkyl peroxides and fluoroxyperfluoroalkanes resulting in the synthesis of new compounds.
    Type: Grant
    Filed: February 23, 1977
    Date of Patent: March 7, 1978
    Assignee: The Unites States of America as represented by the Secretary of the Air Force
    Inventors: Madeline S. Toy, Roger S. Stringham
  • Method for the preparation of bis(perfluoro-t butyl) peroxide
    Patent number: 4075073
    Abstract: A method for synthesizing bis(perfluoro-t-butyl) peroxide through the photolysis of perfluoro-t-butyl hypofluorite in the presence of tetrafluorohydrazine.
    Type: Grant
    Filed: February 23, 1977
    Date of Patent: February 21, 1978
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Madeline S. Toy, Roger S. Stringham