Patents by Inventor Georg Stuhlmuller

Georg Stuhlmuller 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).

  • Terpene ethers and their use
    Patent number: 6395689
    Abstract: The present invention relates to terpene ethers of the general formula (I) in which the substituents have the meanings defined in the description, to a process for their preparation and to their use. The novel terpene ethers are suitable as traction fluids, as fragrances, as solvents and as reactive intermediates.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: May 28, 2002
    Assignee: Clariant GmbH
    Inventors: Adalbert Wagner, Frank Ebmeyer, Georg Stuhlmüller, Maximilian Simon, Herbert Vojacek
  • Process for the continuous preparation of 2,2,6,6-tetramethylpiperidine
    Patent number: 5663351
    Abstract: Process for the continuous preparation of 2,2,6,6-tetramethylpiperidine.The reduction of triacetonamine with hydrazine also succeeds continuously by reactive distillation if the hydrazone is first formed and this is continuously transported to the distillation bottoms comprising a high-boiling solvent and an alkali at the base of a distillation column and the resulting 2,2,6,6-tetramethylpiperidine is distilled off as an azeotrope.In this procedure a hydrazine/triacetonamine ratio of 1.5:1 to 2.0:1 is sufficient, in comparison with the conventional synthesis, the product yield being able to be considerably increased (>90%). Moreover, the amounts of alkali and solvent used can be considerably reduced.
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: September 2, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Detlef Kampmann, Georg Stuhlmuller