Patents by Inventor Theodor Lang

Theodor Lang 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).

  • Printing inks containing a polyether amine fixing agent
    Patent number: 4238234
    Abstract: Disclosed are aqueous printing inks comprising an anionic dyestuff, a pigment or mixtures thereof and a cationic fixing agent based on a water soluble, high molecular weight, cross-linked polyether amine, and the use thereof for printing cellulosic non-woven fabrics, particularly for flexographic printing of tissue papers.
    Type: Grant
    Filed: September 27, 1979
    Date of Patent: December 9, 1980
    Assignee: Sandoz Ltd.
    Inventor: Theodor Lang