Patents by Inventor Pham Huu Chanh

Pham Huu Chanh 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).

  • Yohimbine derivatives, process for their preparation and their applications
    Patent number: 3940387
    Abstract: The present invention relates to yohimbine derivatives. Said derivatives have the general formula ##SPC1##In which R is a radical ##EQU1## or R.sub.1 being an alkyl, aralkyl, alkylaryl, aryl group optionally carrying a nitro group, R.sub.2, R.sub.3 and R.sub.4 being hydrogen, a hydroxy, alkoxy or mono- or dialkylamino group.They possess hypotensive and cardio-stimulant properties.
    Type: Grant
    Filed: May 5, 1972
    Date of Patent: February 24, 1976
    Inventors: Germain Saint-Ruf, Pham Huu Chanh, Buu Hoi