Patents by Inventor Thomas Grabenstein

Thomas Grabenstein 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).

  • Azo compounds
    Patent number: 7812141
    Abstract: The present invention relates to novel dyestuffs of formula (I) wherein the substituents have the meanings defined in the claims, the production of such dyestuffs, the use of these dyestuffs and material dyed or printed by such dyestuffs.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: October 12, 2010
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Robert Egli, Thomas Grabenstein
  • Azo Compounds
    Publication number: 20080161545
    Abstract: The present invention relates to novel dyestuffs of formula (I) wherein the substituents have the meanings defined in the claims, the production of such dyestuffs, the use of these dyestuffs and material dyed or printed by such dyestuffs.
    Type: Application
    Filed: December 12, 2005
    Publication date: July 3, 2008
    Inventors: Robert Egli, Thomas Grabenstein