Patents by Inventor Blaise Pavillard

Blaise Pavillard 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).

  • Purification of caffeine
    Patent number: 4758662
    Abstract: A process for the purification of caffeine which comprises carrying out the following steps in any order;(a) recrystallization of caffeine from an aqueous alkaline solution of caffeine containing a reducing agent and(b) extraction of the caffeine from an aqueous alkaline solution of caffeine with a substantially water-immiscible solvent which is liquid under the conditions of the process.
    Type: Grant
    Filed: February 13, 1987
    Date of Patent: July 19, 1988
    Assignee: Nestec S. A.
    Inventors: Pierre Hirsbrunner, Blaise Pavillard
  • Purification of caffeine
    Patent number: 4531003
    Abstract: A process for the purification of caffeine which comprises carrying out the following steps in any order;(a) recrystallization of caffeine from an aqueous alkaline solution of caffeine containing a reducing agent and(b) extraction of the caffeine from an aqueous alkaline solution of caffeine with a substantially water-immiscible solvent which is liquid under the conditions of the process.
    Type: Grant
    Filed: March 23, 1983
    Date of Patent: July 23, 1985
    Assignee: Nestec S. A.
    Inventors: Pierre Hirsbrunner, Blaise Pavillard