Patents by Inventor David S. Kirkpatrick

David S. Kirkpatrick 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 preparing cimetidine polymorph B
    Patent number: 4786735
    Abstract: A novel process for preparing cimetidine polymorph "B" comprises precipitating cimetidine from an aqueous-alcoholic solution of an acid addition salt. The precipitation is conducted at a temperature of above 15.degree. C.
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: November 22, 1988
    Assignee: Smithkline Beckman Corporation
    Inventors: Harold Graboyes, David S. Kirkpatrick