Patents by Inventor Leonard Eric Houghton

Leonard Eric Houghton 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).

  • Fluorocarbon surfactants
    Patent number: 4079084
    Abstract: Novel fluorocarbon surfactants containing a non-ionic hydrophilic chain (preferably an oxyethylene chain) and at least two terminal perfluorocarbon groups of at least three carbon atoms, preferably branched perfluorocarbon groups derived from an oligomer of tetrafluoroethylene.
    Type: Grant
    Filed: July 25, 1974
    Date of Patent: March 14, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventor: Leonard Eric Houghton
  • Fluorocarbon derivatives of pyridine
    Patent number: 3944558
    Abstract: Compounds having the general formula [C.sub.n F.sub.2n.sub.-1 (HF).sub.x ](C.sub.5 H.sub.4 N)O wherein n is an integer from 3 to 20 and x is 0 or 1, the group C.sub.5 H.sub.4 N is a pyridine nucleus and 0 is an oxygen atom covalently attached to a carbon atom of the nucleus.
    Type: Grant
    Filed: December 18, 1972
    Date of Patent: March 16, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: Leonard Eric Houghton, John Hutchinson