Patents by Inventor Karl Sommer

Karl Sommer 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).

  • Stable monoazo dyestuff
    Patent number: 4074965
    Abstract: The modification being stable under dyeing conditions of the dyestuff of the formula ##STR1## characterized by an X-ray diffraction diagram with characteristic reflexes at the following glance angles .theta.with the relative intensities as given below:______________________________________ [o] 2.45 6.30 10.07 11.00 11.35 11.70 12.36 13.55 14.80 15.85 63 100 30 48 83 88 86 59 52 34 ______________________________________Said modification in the form of a liquid or solid dyeing preparation being suitable for the dyeing of fibrous materials consisting of cellulose esters or synthetic linear polyesters.
    Type: Grant
    Filed: May 7, 1976
    Date of Patent: February 21, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hubert Kruse, Karl Sommer