Patents by Inventor Sylvia Lohmann

Sylvia Lohmann 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 delustered polyamide fibers with acid dyestuffs and metal salts
    Patent number: 5462565
    Abstract: The new process for dyeing polyamide fibers with acid dyestuffs, in which small amounts of metal salts are added to the dyebath, gives dyeings having improved lightfastness.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: October 31, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jurgen Rohr, Martin Riegels, Sylvia Lohmann