Patents by Inventor Marcel Dumont

Marcel Dumont 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).

  • Patent number: 4256875
    Abstract: A process for the extraction of sennosides from senna folioles and follicles, comprising the rapid exhaustion of the plant by means of cold water, in a neutral or slightly alkaline medium, followed by acidification and extraction with butanol.This process minimizes oxidation and hydrolysis of the product and achieves improved yields and purity.
    Type: Grant
    Filed: April 11, 1979
    Date of Patent: March 17, 1981
    Assignee: Synthelabo
    Inventors: Jean P. Gabriel, Marcel Dumont, Robert Guille