Patents by Inventor Henry C. Winiarski

Henry C. Winiarski 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).

  • Low pressure process for producing substantially voidless composites
    Patent number: 4197339
    Abstract: Filament-reinforced A-type PMR polyimide composites are prepared by mixing known monomers, applying the mixture as a matrix material to a plurality of the filaments, imidizing to obtain a prepolymer having a defined melt temperature range, heating the prepolymer to an addition polymerization temperature to effect cure, applying a pressure of 50-300 psi before reaching cure temperature and while in the melt temperature range, and maintaining said pressure while curing.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: April 8, 1980
    Assignee: United Technologies Corporation
    Inventors: Roy D. Paul, Henry C. Winiarski