Patents by Inventor Ernst Wilhelm

Ernst Wilhelm 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 cellulose fibers
    Patent number: 4036587
    Abstract: A process for dyeing cellulose fibers and mixtures of the same with synthetic fibers in an aqueous liquor by the exhaustion method in the presence of a water-soluble polymer of acrylic acid or an alkali metal salt or ammonium salt thereof, an alkali metal or ammonium salt of a copolymer of maleic acid and styrene, maleic acid and a vinyl ester or maleic acid and a vinyl ether as a dyeing assistant in an amount of from 0.05 to 2% by weight based on the material being dyed. Level dyeings are obtained and mixtures of fibers can be dyed in a single liquor.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: July 19, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Wolf, Jozsef Gerendas, Ernst Wilhelm