Patents by Inventor Rotger Mitgau

Rotger Mitgau 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 making carrier sheets impregnated with aminoplast condensation resins
    Patent number: 3935336
    Abstract: A process for making carrier sheets of paper, treated with aqueous solutions of heat-hardenable, aminoplast condensation resins, such as, the reaction products of melamine, urea, thiourea, and like aminoplast constituents with formaldheyde, in which the treated sheet is stretched, as by passing it over broad-drawing rollers while it is in a warm-deformable condition (at a temperature between about 80.degree. to 130.degree.C), transversely with respect to the grain of the paper and, if desired, longitudinally with respect to the grain of the paper, and the treated stretched sheet is then cooled to a temperature of about 30.degree.C by blowing with air or passing the same over cooling rollers.
    Type: Grant
    Filed: February 16, 1973
    Date of Patent: January 27, 1976
    Assignee: Th. Goldschmidt AG
    Inventors: Rotger Mitgau, Bruno Petrik, Dietmar Schedlitzki