Patents by Inventor Helmut Brahm

Helmut Brahm 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).

  • Polyurethane solutions
    Patent number: 4024307
    Abstract: A process for the production of polyurethane solutions by reaction of a diisocyanate with a mixture of a glycol and a polymer bearing terminal hydroxy groups in a solvent medium under certain prescribed conditions. The resulting polyurethane solutions are especially valuable as impregnants or coating agents for textile substrates, for example in the preparation of a microporous synthetic leather.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: May 17, 1977
    Assignee: Akzo N.V.
    Inventors: Helmut Brahm, Helmut Schulze