Patents by Inventor Guenther Boehmke

Guenther Boehmke 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).

  • Concentrated solutions of anionic dyestuffs
    Patent number: 3995997
    Abstract: Anionic dyestuffs which contain as the cation at least one cation of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 denote alkyl with 1-6 C-atoms, cycloalkyl with 5-7 C-atoms or aralkyl with 7-12 C-atoms or represent a group ##STR2## wherein R.sub.4 and R.sub.5 denote hydrogen, methyl or ethyl andn represents the numbers 1-20Are suitable for the preparation of storage-stable, water-miscible, concentrated solutions.
    Type: Grant
    Filed: August 8, 1974
    Date of Patent: December 7, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Guenther Boehmke, Werner Theuer, Konrad Nonn, Georg Pape