Patents by Inventor Isabelle Gagne

Isabelle Gagne 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).

  • Process for simultaneous mechanical and chemical defibration of corn stalks and straw materials
    Patent number: 5944953
    Abstract: A corn stalk and straw chip pulping method to greatly improve the yield of pulp by 1) preconditioning the corn stalk with propionic acid when harvesting or by impregnating the straw with HNO.sub.2 in the mill after chip washing, and 2) by pulping the stalk or straw chips in a high-consistency pulper with a KOH liquor, with or without K.sub.2 SO.sub.3, at a 12 to 15 percent consistency at 90.degree. C. for a predetermined time period (30 to 60 minutes). The pulping improvement step increases the yield of corn stalk and straw pulp from approximately 40 percent to 70 to 75 percent.
    Type: Grant
    Filed: March 12, 1996
    Date of Patent: August 31, 1999
    Assignee: Le Centre Specialise en Pates et Papiers (CSPP) du College D'Enseignement General et Professionnel de Trois-Riveres
    Inventors: Pierre Lavoie, Dennis Mondor, Jean Paradis, Daniel Thibautot, Isabelle Gagne, Marco Pelletier