Patents by Inventor Louis Raux

Louis Raux 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).

  • Unfalsifiable safety paper
    Patent number: 4725497
    Abstract: This invention relates to an unfalsifiable safety paper comprising on its surface and/or in its mass, at least one compound responding to formula: ##STR1## in which: R corresponds to hydrogen, to an alkyl group of C.sub.1 to C.sub.8, substituted or not, to a non-substituted, N-substituted or N,N-substituted amine group, to NO.sub.2, to a halogen;n is equal to 0 or 1.The invention is applicable to handwritten pieces for payment.
    Type: Grant
    Filed: January 17, 1986
    Date of Patent: February 16, 1988
    Assignee: Societe Anonyme: Aussedat-Rey
    Inventors: Andre Honnorat, Claude Riou, Louis Raux