Patents by Inventor Guenter Roscher

Guenter Roscher 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 sorbic acid by thermal cleavage
    Patent number: 6673963
    Abstract: The invention relates to a process for preparing sorbic acid by thermal cleavage in a solvent of the polyester prepared from crotonaldehyde and ketene, the cleavage of the polyester being carried out in the presence of 20 to 100% by weight of a secondary or tertiary aliphatic, alicyclic nitrogen- and/or oxygen-containing amine, or aliphatic-aromatic substituted amine, as catalyst.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: January 6, 2004
    Assignee: Nutrinova Nutrition Specialties & Food Ingredients GmbH
    Inventors: Daniel Decker, Guenter Roscher, Christoph Mollenkopf, Erwin Weiss, Stefan Purps
  • Process for preparing sorbic acid by thermal cleavage
    Publication number: 20030060658
    Abstract: The invention relates to a process for preparing sorbic acid by thermal cleavage in a solvent of the polyester prepared from crotonaldehyde and ketene, the cleavage of the polyester being carried out in the presence of 20 to 100% by weight of a secondary or tertiary aliphatic, alicyclic nitrogen- and/or oxygen-containing amine, or aliphatic-aromatic substituted amine, as catalyst.
    Type: Application
    Filed: September 9, 2002
    Publication date: March 27, 2003
    Inventors: Daniel Decker, Guenter Roscher, Christoph Mollenkopf, Erwin Weiss, Stefan Purps
  • Process for preparing dimethyl vinylphosphonate from dimethyl 2-acetoxyethanephosphonate
    Patent number: 5763637
    Abstract: The invention relates to a process for preparing dimethyl vinylphosphonate by thermal dissociation of dimethyl 2-acetoxyethanephosphonate in the gas phase, which comprises vaporizing dimethyl 2-acetoxyethanephosphonate and dissociating it without catalysis at a temperature of from 400.degree. to 700.degree. C. into dimethyl vinylphosphonate and acetic acid.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: June 9, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Knut Riedel, Udo Dettmeier, Guenter Roscher