Patents by Inventor Barbara Jaeger

Barbara Jaeger 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 ?-keto acids and derivatives thereof
    Patent number: 8299293
    Abstract: A method for preparing ?-keto acids, especially ?-ketomethionine, and/or derivatives thereof, whereby an aldehyde is reacted with thiols to give a corresponding dithioacetal, the dithioacetal formed, is reacted with an electrophile in the presence of a strong base, and the resulting ?,?-(dithio)carboxylic acid is solvolyzed with acid-catalysis to release thiol and give the ?-keto acid or a derivative thereof. Umpolung of aliphatic or aromatic aldehydes is effected by reaction with thiols.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: October 30, 2012
    Assignee: Evonik Degussa GmbH
    Inventors: Christoph Kobler, Martin Hateley, Philipp Roth, Barbara Jaeger, Christoph Weckbecker, Klaus Huthmacher
  • Ketomethionine ketals and derivatives thereof
    Patent number: 7815950
    Abstract: Ketomethionine ketals and hemiketals and derivatives thereof are useful as feed additives, in particular for the nutrition of ruminants.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: October 19, 2010
    Assignee: Evonik Degussa GmbH
    Inventors: Christoph Kobler, Martin Hateley, Philipp Roth, Barbara Jaeger, Rainer Peter, Christoph Weckbecker, Klaus Huthmacher
  • PROCESS FOR PREPARING a-KETO ACIDS AND DERIVATIVES THEREOF
    Publication number: 20090076302
    Abstract: A method for preparing ?-keto acids, especially ?-ketomethionine, and/or derivatives thereof, whereby an aldehyde is reacted with thiols to give a corresponding dithioacetal, the dithioacetal formed, is reacted with an electrophile in the presence of a strong base, and the resulting ?,?-(dithio)carboxylic acid is solvolyzed with acid-catalysis to release thiol and give the ?-keto acid or a derivative thereof. Umpolung of aliphatic or aromatic aldehydes is effected by reaction with thiols.
    Type: Application
    Filed: July 9, 2008
    Publication date: March 19, 2009
    Applicant: EVONIK DEGUSSA GmbH
    Inventors: Christoph Kobler, Martin Hateley, Philipp Roth, Barbara Jaeger, Christoph Weckbecker, Klaus Huthmacher
  • KETOMETHIONINE KETALS AND DERIVATIVES THEREOF
    Publication number: 20080124426
    Abstract: Ketomethionine ketals and hemiketals and derivatives thereof are useful as feed additives, in particular for the nutrition of ruminants.
    Type: Application
    Filed: November 20, 2007
    Publication date: May 29, 2008
    Applicant: EVONIK DEGUSSA GmbH
    Inventors: Christoph Kobler, Martin Hateley, Philipp Roth, Barbara Jaeger, Rainer Peter, Christoph Weckbecker, Klaus Huthmacher