Patents by Inventor James C. Drummond

James C. Drummond 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).

  • Preparation of dihydroxydiphenyl alkanes
    Patent number: 4110542
    Abstract: A process is described for preparing 4,4'-dihydroxydiphenylethane by reacting phenol with a 1,2-dihaloethane in which the halogen is chlorine, bromine or iodine, in at least the stoichiometric proportions of 2:1 in contact with a catalyst comprising lanthanum oxide supported on an inorganic material such as silica at a temperature from about 125.degree. to about 225.degree. C. and in the presence of a hydrogen halide as a promoter.
    Type: Grant
    Filed: December 30, 1976
    Date of Patent: August 29, 1978
    Assignee: Monsanto Company
    Inventors: James C. Drummond, Lawrence J. Hughes