Patents by Inventor John B. Christian

John B. Christian 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).

  • Patent number: 4454349
    Abstract: Fluorinated phosphines having the general formula ##STR1## wherein R.sub.f OR.sub.f -- is a perfluoroalkylether group containing at least one ether linkage are useful as antioxidation additives for perfluorinated fluids.
    Type: Grant
    Filed: September 14, 1982
    Date of Patent: June 12, 1984
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Christ Tamborski, Carl E. Snyder, Jr., John B. Christian
  • Patent number: 4431556
    Abstract: A grease composition comprising a major amount of a polyfluoroalkylether base fluid of the general formulaAO(CF.sub.2 CF.sub.2 O).sub.m (CF.sub.2 O).sub.n Bwherein A and B are --CF.sub.3 or --C.sub.2 F.sub.5, and m and n are integers and the sum of m+n is between 2 and 200 and the ratio n/m is in the range of 0.1:1 to 10:1, a minor amount of a thickener and an oxidation inhibiting amount of a perfluoroalkylether phenylphosphine of the general formula ##STR1## wherein a has a value of zero or 1, Ar is a phenylene or perfluorophenylene group, and --R.sub.f OR.sub.f is a perfluoroalkylether group containing at least one ether linkage.
    Type: Grant
    Filed: September 14, 1982
    Date of Patent: February 14, 1984
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John B. Christian, Christ Tamborski
  • Patent number: 4431555
    Abstract: A grease composition comprising a major amount of a polyfluoroalkylether base fluid of the general formulaC.sub.3 F.sub.7 [CF(CF.sub.3)CF.sub.2)].sub.n CF.sub.2 CF.sub.3 (a)wherein n is an integer having a value in the range of 5 to 50, orF[CF(CF.sub.3)CF.sub.2 O].sub.p CHFCF.sub.3 (b)wherein p is an integer having a value of 1 to 17, a minor amount of a thickener and an oxidation inhibiting amount of a perfluoroalkylether phenylphosphine of the general formula(O).sub.a --P--Ar-CF.sub.2 -R.sub.f OR.sub.f).sub.3wherein a has a value of zero or 1, Ar is a phenylene or perfluorophenylene group, and --R.sub.f OR.sub.f is a perfluoroalkylether group containing at least one ether linkage.
    Type: Grant
    Filed: September 14, 1982
    Date of Patent: February 14, 1984
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John B. Christian, Christ Tamborski
  • Patent number: 4406800
    Abstract: An extreme pressure grease composition capable of limiting temperature increase comprising a poly(alpha-olefin) as a base fluid and a tetralkyl ammonium smectite clay as a thickener. Antimony dialkyldithiocarbamate and molybdenum disulfide may be added to the grease composition as an extreme pressure inhibitor.
    Type: Grant
    Filed: March 23, 1982
    Date of Patent: September 27, 1983
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: John B. Christian
  • Patent number: 4324671
    Abstract: An antirust, anticorrosion grease composition comprising a major amount of a fluorinated polysiloxane base fluid, a minor amount of a fluorocarbon polymer thickening agent, and a rust and corrosion inhibiting amount of a benzimidazole.
    Type: Grant
    Filed: February 10, 1981
    Date of Patent: April 13, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John B. Christian, Christ Tamborski
  • Patent number: 4324673
    Abstract: An antirust, anticorrosion grease composition comprising a major amount of a polyfluoroalkylether base fluid, a minor amount of a fluorocarbon polymer thickening agent, and a rust and corrosion inhibiting amount of a benzimidazole.
    Type: Grant
    Filed: January 16, 1981
    Date of Patent: April 13, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John B. Christian, Christ Tamborski
  • Patent number: 4267348
    Abstract: Benzimidazoles substituted in the 2-position with a perfluoroalkyleneether radical. The compounds are useful as antirust and anticorrosion additives in grease formulations based on fluorine-containing fluids.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: May 12, 1981
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Christ Tamborski, John B. Christian
  • Patent number: 4132660
    Abstract: An antirust, anticorrosion grease composition comprising a major proportion of a perfluorinated polyalkylether base fluid, a minor proportion of a fluorocarbon polymer thickening agent, and a rust and corrosion inhibiting amount of a fluorine-containing benzoxazole.
    Type: Grant
    Filed: March 1, 1978
    Date of Patent: January 2, 1979
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John B. Christian, Christ Tamborski
  • Patent number: 4120863
    Abstract: Benzoxazoles substituted in the 2-position with a perfluoroalkylether radical and bis-benzoxazoles in which the 2-position carbon atoms of the benzoxazole rings are attached to one another with a perfluoroalkylene or perfluoroalkyleneether radical. The compounds are useful as anti-rust additives in grease formulations based on fluorine-containing fluids.
    Type: Grant
    Filed: September 27, 1977
    Date of Patent: October 17, 1978
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Christ Tamborski, John B. Christian