Patents by Inventor Ronald Andrew Lemahieu

Ronald Andrew Lemahieu 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).

  • 7-Oxa steroids
    Patent number: 3962275
    Abstract: 7-Oxa steroids which may be substituted in the 3-position with a hydroxy or oxo group or in the 2-position with a hydroxymethylene group or in the 2- and 3-positions with a substituent that forms a 5-membered heterocyclic ring, useful as antigonadotropic agents and a method of preparing these 7-oxa steroids from 3-hydroxy .DELTA..sup.5 -steroids including intermediates in this process.
    Type: Grant
    Filed: December 11, 1974
    Date of Patent: June 8, 1976
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Robert William Guthrie, Richard Wightman Kierstead, Ronald Andrew Lemahieu