Patents by Inventor Hellmut Felle

Hellmut Felle 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).

  • Continuous process for dyeing cellulose/polyamide blends: thermobol pad liquor containing nonionic surfactant
    Patent number: 4654046
    Abstract: The invention relates to a thermosol pad-steam process for the continuous dyeing of cellulose/polyamide blends, which comprises impregnating said blends with a pad liquor which contains a non-ionic surfactant or a mixture of non-ionic surfactants, in addition to at least one vat dye and at least one metal complex dye and optionally further auxiliaries.This process is particularly suitable for dyeing large yardages.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: March 31, 1987
    Assignee: Ciba-Geigy Corporation
    Inventor: Hellmut Felle