Patents by Inventor Wilhelm Gottsch

Wilhelm Gottsch 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).

  • 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
  • Methylcyclododecatri-2,5,9-en-1-ols, a process for their preparation, and their use
    Patent number: 4853368
    Abstract: The invention relates to new methylcyclododecatri-2,5,9-en-1-oles of formula ##STR1## in which one of the dashed lines represents a double bond and the other a single bond, and the endocyclic double bonds may be cis- and trans-configured,a process for their preparation and their use as scents.
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: August 1, 1989
    Assignee: Haarmann & Reimer GmbH
    Inventors: Jurgen Neinhaus, Rudolf Hopp, Wilhelm Gottsch, Egon Oelkers
  • Scents, and scent compositions containing them
    Patent number: 4814322
    Abstract: The invention relates to 1,2-dialkoxyalkenes of the formula ##STR1## in which R denotes an alkyl group having 1 to 3 carbon atoms, andn denotes an integer from 2 to 8 and to the use of 1,2-dialkoxyalkanes and -alkenes of the formula ##STR2## in which R denotes an alkyl group having 1 to 3 carbon atoms,n denotes an integer from 2 to 8, and ##STR3## denotes the CH.sub.3 --CH.sub.2 -- or CH.sub.2 50 CH-- group, as scents.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: March 21, 1989
    Assignee: Haarmann & Reimer GmbH
    Inventors: Fritz Exner, Detlef Hagena, Rudolf Hopp, Jurgen Nienhaus, Wilhelm Gottsch