Patents by Inventor Stephen Collyer Smith

Stephen Collyer Smith 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 manufacture of indole derivatives
    Patent number: 4022780
    Abstract: Manufacture of 1-(quinazolin-4-yl)indol-3-ylacetic acids and salts thereof by reacting a phenylhydrazone derivative with a quinazoline derivative, for example a halogenoquinazoline, and then ring-closing the resulting intermediate product. An illustrative product of the process of the invention is 1-(7-chloroquinazolin-4-yl)-5-methoxy-2-methylindol-3-ylacetic acid.
    Type: Grant
    Filed: April 22, 1976
    Date of Patent: May 10, 1977
    Assignee: Imperial Chemical Industries Limited
    Inventors: Martin Doyle, Stephen Collyer Smith
  • Indole derivatives for providing analgesic and anti-inflammatory effects
    Patent number: 4012513
    Abstract: 1-(Heterocyclic)-indol-3-ylacetic acid derivatives, processes for their preparation, and pharmaceutical compositions comprising them. An illustrative compound of the invention is 1-(7-chloroquinazolin-4-yl)-5-methoxy-2-methylindol-3-ylacetic acid. The compounds have anti-inflammatory, analgesic and antipyretic activity. This application is a continuation-in-part of Ser. No. 296,202, filed Oct. 10, 1972, now U.S. Pat. No. 3,884,919.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: March 15, 1977
    Assignee: Imperial Chemical Industries Limited
    Inventors: George Richard Birchall, Walter Hepworth, Stephen Collyer Smith