Patents by Inventor Helmuth Prochaska

Helmuth Prochaska 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 dyeing and printing sheets
    Patent number: 4190417
    Abstract: The present invention is concerned with a process for dry printing or dyeing of sheets. A foam structure is printed or dyed and placed in contact with the sheet to be treated. The composite is subjected to sufficient heat and pressure to destroy the foam structure without significantly damaging the sheet. The result is the sheet surface now appears to carry the printing or dyeing. Among the suitable carrier foams are polyurethane foams. The process finds particular utility in coloring difficult to dye substrates such as cotton, fiber glass or asbestos fabrics with water insoluble dyes.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: February 26, 1980
    Assignees: Mobay Chemical Corporation, Bayer Aktiengesellschaft
    Inventors: Helmuth Prochaska, Gert F. Baumann, Peter Rasche, Heinz Muller, Alberto Gonzales-Dorner