Patents by Inventor Frank Steven Burkus, II

Frank Steven Burkus, II 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).

  • Synthesis of a linear phosphonitrilic chloride catalyst
    Patent number: 5916993
    Abstract: The present invention relates to a process for the synthesis of a linear phosphonitrilic chloride LPNC catalyst solution in a siloxane medium. The process involves mixing phosphorus pentachloride with a suitable silazane followed by warming the reaction mixture to yield a LPNC catalyst solution.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: June 29, 1999
    Assignee: General Electric Company
    Inventor: Frank Steven Burkus, II
  • Process to synthesize a linear phosphonitrilic chloride catalyst
    Patent number: 5912203
    Abstract: The present invention relates to a process for the synthesis of a linear phosphonitrilic chloride (LPNC) catalyst solution. The process involves mixing phosphorus pentachloride with a suitable silazane in a methylene chloride medium. The methylene chloride is then replaced with a siloxane medium followed by heating this mixture to form a LPNC catalyst solution.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: June 15, 1999
    Assignee: General Electric Company
    Inventors: Frank Steven Burkus, II, Michael Lee White
  • Method for making reaction products of phosphorus pentachloride and ammonium chloride
    Patent number: 5716589
    Abstract: The reaction of phosphorus pentachloride with ammonium chloride is conducted in the presence of a metal-containing catalyst and carbon dioxide, preferably supercritical carbon dioxide, as a solvent. The product is generally superior in catalytic action for the polycondensation and rearrangement of organosiloxanes to conventional linear phosphonitrilic chlorides.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: February 10, 1998
    Assignee: General Electric Company
    Inventors: Philip George Kosky, Frank Steven Burkus II, James Anthony Cella, Slawomir Rubinsztajn, Senya Marie Hiscox
  • Peralkylated phosphazene base-catalyzed silanol condensation method
    Patent number: 5688888
    Abstract: Organopolysiloxane oils and gums are produced by the condensation of silanol-terminated organosiloxane in the presence of an effective amount of a peralkylated phosphazene base as a catalyst and at reduced pressure.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: November 18, 1997
    Assignee: General Electric Company
    Inventors: Frank Steven Burkus, II, Krzysztof Matyjaszewski, Slawomir Rubinsztajn