Patents by Inventor Jean-Pierre Carrard

Jean-Pierre Carrard 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).

  • Paper manufacture with improved retention agents
    Patent number: 4070236
    Abstract: DISCLOSED is a process for the production of paper and paper-like products which comprises the step of incorporating in the pulp a retention agent comprising a polyalkylene oxide of molecular weight in excess of 1 million and a phenol- or naphthol-formaldehyde or -sulphur resin.
    Type: Grant
    Filed: November 10, 1975
    Date of Patent: January 24, 1978
    Assignee: Sandoz Ltd.
    Inventors: Jean-Pierre Carrard, Helmut Pummer