Patents by Inventor Theodore Psarras

Theodore Psarras 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).

  • Perfluoroalkyl polytriazines containing pendent iododifluoromethyl groups
    Patent number: 4234715
    Abstract: New perfluoroalkyl polytriazines containing pendent iododifluoromethyl groups are prepared by the reaction of perfluoroalkyl dinitriles with ammonia to form poly(imidoylamidines), followed by the cyclization of the imidoylamidine groups with, e.g. various mixtures of a perfluoroacyl fluoride with an .omega.-iodoperfluoroacyl fluoride. The polytriazines obtained can be cured by heat which causes crosslinking at the iododifluoromethyl groups by elimination of iodine and formation of carbon-to-carbon bonds.
    Type: Grant
    Filed: May 8, 1979
    Date of Patent: November 18, 1980
    Inventors: Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch, Robert W. Rosser, Theodore Psarras
  • Symmetrical perfluoroalkylene oxide .alpha.,.omega.-diacyl fluorides
    Patent number: 4181678
    Abstract: Symmetrical perfluoroalkylene oxide .alpha.,.omega.-diacyl fluoride is prepared by reacting a perfluoroalkylene oxide, .alpha., .omega.-diiodide with fuming sulfuric acid in the presence of zinc sulfate while adding chlorine.
    Type: Grant
    Filed: September 15, 1978
    Date of Patent: January 1, 1980
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Theodore Psarras
  • .omega.-Iodoperfluoroalkylene oxide acyl fluorides
    Patent number: 4181679
    Abstract: .omega.-Iodoperfluoroalkylene oxide acyl fluorides are prepared by reacting a perfluoroalkylene oxide .alpha.,.omega.-diiodide with fuming sulfuric acid in the presence of zinc sulfate. The iodoacyl fluorides are intermediates for use in synthesizing perfluoroalkylene ether diimidate esters.
    Type: Grant
    Filed: October 24, 1978
    Date of Patent: January 1, 1980
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Theodore Psarras
  • Omega-carbomethoxyperfluoroalkylene oxide iodides
    Patent number: 4032566
    Abstract: Fluorinated ethers are provided that contain two functional end groups (ester and iodide groups) separated by a plurality of difluoromethylene, fluoro-trifluoromethylmethylene and oxygen groups. The compounds are useful as intermediates, particularly in the synthesis of fluoroalkylether difunctional compounds which can be used in the preparation of improved thermally stable polymers.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: June 28, 1977
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Theodore Psarras, Christ Tamborski