Patents by Inventor Pierre F. LePoutre

Pierre F. LePoutre 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).

  • Latex of poly-.beta.-hydroxyalkanoates for treating fiber constructs and coating paper
    Patent number: 5451456
    Abstract: A latex comprises a colloidal suspension in water of essentially non-crystalline particles of a polymer or copolymer or .beta.-hydroxyalkanoates, for example .beta.-hydroxybutyrate and .beta.-hydroxyvalerate; the latex may be employed to produce self-supporting filfms or papers which are biodegradable and also readily recyclable.
    Type: Grant
    Filed: August 18, 1992
    Date of Patent: September 19, 1995
    Assignee: Pulp and Paper Research Institute of Canada
    Inventors: Robert H. Marchessault, Pierre F. LePoutre, Peter E. Wrist
  • Coating of paper
    Patent number: 4328284
    Abstract: The opacity and brightness of a sheet of paper coated with a composition comprised essentially of a pigment and a latex of a film-forming polymer are improved when the paper after being coated is dried under conditions adapted to prevent coalescence of the polymer particles of the latex during the drying step and then subjected to a treatment adapted to cause coalescence of the polymer particles, without subjecting the coating to compressive forces during this treatment step.
    Type: Grant
    Filed: March 4, 1980
    Date of Patent: May 4, 1982
    Inventor: Pierre F. LePoutre