Patents by Inventor Fritz Peter Boettcher

Fritz Peter Boettcher 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).

  • Gas-barrier coated films, sheets or foils and method of preparation
    Patent number: 4104438
    Abstract: Films, sheets or foils are given a gas-barrier coating of an aromatic polyamide, polyimide, polyamide-imide, polyhydrazide, polyamide-hydrazide, or polyazomethine by direct vapor-phase condensation polymerization of their respective monomers. The monomers are introduced in an inert diluent gas, mixed and reacted in the presence of the surface to be coated. The surface is maintained above the critical minimum deposition temperature of the monomers but below about 300.degree. C. The coating is formed to a thickness between about 0.1 and 0.6 mil.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: August 1, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Rudolph John Angelo, Richard Nelson Blomberg, Fritz Peter Boettcher, Richard Masayoshi Ikeda, Michael Robert Samuels