Patents by Inventor Gernard Stern

Gernard Stern 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 the manufacture of foamed plastics with improved combustion characteristics
    Patent number: 4176217
    Abstract: Production of foamed plastics with improved combustion characteristics by condensing aqueous solutions of aminoplast precondensates with at least bifunctional organic isocyanate whereby an acid curing catalyst and an accelerator for polyurethane formation is used. For performing the condensation, the aqueous solution of the precondensate is added to the mixture of isocyanate and the accelerator at the same time as but separately from the acid curing catalyst.
    Type: Grant
    Filed: January 4, 1979
    Date of Patent: November 27, 1979
    Assignee: Chemie Linz Aktiengesellschaft
    Inventors: Leopold Golser, Hubert Czepel, Gernard Stern