Patents by Inventor Hugh Latimer Dryden, Jr.

Hugh Latimer Dryden, Jr. 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 preparation of tertiary amines
    Patent number: 4086234
    Abstract: Certain tertiary amines useful as pharmaceuticals are prepared in improved yields by condensing a cyclic secondary amine with a primary alkyl halide in an aqueous medium in the presence of an acid acceptor.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: April 25, 1978
    Assignee: G. D. Searle & Co.
    Inventors: Hugh Latimer Dryden, Jr., Robert A. Erickson