Patents by Inventor Bernard Engelbart

Bernard Engelbart 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).

  • Smoke suppressants for halogen-containing plastic compositions
    Patent number: 3945974
    Abstract: Zinc is added to a halogen-containing plastic composition with or without a flame retardant additive to serve as a smoke suppressant during combustion of the plastic.
    Type: Grant
    Filed: December 20, 1973
    Date of Patent: March 23, 1976
    Assignee: N L Industries, Inc.
    Inventors: Joseph Schwarcz, Bernard Engelbart, Edward L. White