Patents by Inventor Heinrich Schmeisser

Heinrich Schmeisser 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).

  • Thermochromic rylene dyes
    Patent number: 6486319
    Abstract: The invention relates to rylene dyes of the general formula (I), wherein the variables have the following meanings: R represents hydrogen; optionally substituted C1-C30 alkyl-C5-C8-cycloalkyl, aryl or hetaryl; R′ represents optionally substituted C2-C30 alkyl or C5-C8 cycloalkyl, substituted methyl; and n is 0 or 1. The invention also relates to the preparation and use of said dyes for coloring highly molecular organic and inorganic materials and to 9-amino-perylene-3,4-dicarboxylic acid imides (Va) as their intermediate products.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: November 26, 2002
    Assignees: BASF Aktiengesellschaft, Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V.
    Inventors: Arno Böhm, Heinrich Schmeisser, Stefan Becker, Klaus Müllen