Patents by Inventor Graham K. Hughes

Graham K. Hughes 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 the production of alkyl aryl ethers
    Patent number: 4294992
    Abstract: Alkyl aryl ethers are produced by incrementally reacting an acid and an alkanol with a phenol and continuously removing water formed as a by-product of the reaction. Preferably, the acid is sulfuric acid; the alkanol is methanol; and the phenol is .beta.-naphthol. The process is carried out at an elevated temperature, preferably at a temperature ranging from 125.degree. to 175.degree. C.
    Type: Grant
    Filed: January 23, 1980
    Date of Patent: October 13, 1981
    Assignee: The Southland Corporation
    Inventor: Graham K. Hughes
  • Mixtures of aliphatic amines and quaternary ammonium compounds thereof
    Patent number: 4098822
    Abstract: A mixture of specified long chain aliphatic alcohols is contacted at atmospheric pressure and at an elevated temperature with ammonia in the presence of a hydrogenation-dehydrogenation catalyst while continuously removing water of reaction and excess ammonia, to produce a mixture of aliphatic amines predominating in secondary amines. Such amine product is quaternized to yield corresponding mixtures of fabric softening quaternary ammonium compounds capable of providing aqueous dispersions thereof exhibiting outstanding stability characteristics at low concentrations of active content.
    Type: Grant
    Filed: October 26, 1973
    Date of Patent: July 4, 1978
    Assignee: Ashland Oil, Inc.
    Inventors: Richard R. Egan, Graham K. Hughes, Jack W. Sigan