Patents by Inventor Karl Zesiger

Karl Zesiger 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 producing dyed and anti-shrink treated wool
    Patent number: 4436521
    Abstract: The invention relates to a process for the production of anti-shrink treated wool dyeings in which wool is dyed with acid milling or metal complex dyes either before, after or between the steps of an anti-shrink treatment and, after the dyeing or the anti-shrink treatment or one of the steps of the anti-shrink treatment subsequent to the dyeing, is after-treated with a liquor containing a cationic fixing agent and a levelling/retarding agent having affinity for wool dyestuffs, and to a composition usable for such a process.
    Type: Grant
    Filed: May 27, 1982
    Date of Patent: March 13, 1984
    Assignee: Sandoz Ltd.
    Inventors: Oskar Annen, Hermann Egli, Karl Zesiger