Patents by Inventor Thomas Thielmann

Thomas Thielmann 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).

  • Process for preparing substituted 2-cyanocinnamic esters
    Patent number: 5451694
    Abstract: In the preparation of substituted 2-cyanocinnamic esters by the Knoevenagel condensation of cyanoacetic esters and carbonyl compounds, the reaction times for obtaining high yields can be considerably reduced by using C.sub.3 -C.sub.6 -monocarboxylic acids and ammonium compounds as catalysts.
    Type: Grant
    Filed: April 22, 1994
    Date of Patent: September 19, 1995
    Assignee: Haarmann & Reimer GmbH
    Inventors: Walter Kuhn, Werner Marks, Thomas Thielmann, Erich Dilk
  • Ethers of 1-hydroxy-hex-5-en-2-one, processes for their preparation and their use as odoriferous substances
    Patent number: 5248831
    Abstract: Ethers of 1-hydroxy-hex-5-en-2-one are useful odoriferous substances which have a very complex fragrance pattern and allow an interesting variation in the scent of perfume oils.
    Type: Grant
    Filed: June 18, 1992
    Date of Patent: September 28, 1993
    Assignee: Haarmann & Reimer GmbH
    Inventors: Rudolf Hopp, Thomas Thielmann, Wilhelm Gottsch
  • Cyclopentyl-cyanomethyl-cyclopentenes, process for their preparation and their use as odoriferous substances
    Patent number: 5212153
    Abstract: New nitriles which are odoriferous substances having an extremely fresh note are accessible by Knoevenagel condensation of 2-cyclopentyl-cyclopentanone and cyanoacetic acid and decarboxylation of the reaction product.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: May 18, 1993
    Assignee: Haarmann & Reimer GmbH
    Inventors: Rudolf Hopp, Thomas Thielmann, Wilhelm Gottsch
  • Alkadienenitriles, process for their preparation and their use
    Patent number: 5105005
    Abstract: The invention relates to new alkadienenitriles of the formula ##STR1## in which n is an integer from 5 to 9, a process for their preparation and their outstanding suitability as odororiferous substances.
    Type: Grant
    Filed: September 12, 1990
    Date of Patent: April 14, 1992
    Assignee: Haarmann & Reimer GmbH
    Inventors: Rudolf Hopp, Thomas Thielmann, Wilhelm Gottsch