Patents by Inventor Sems Yonsel

Sems Yonsel 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 isolating hydroxymonocarboxylic and tricarboxylic acids
    Patent number: 5676838
    Abstract: The invention relates to the removal of hydroxymonocarboxylic acids and tricarboxylic acids from aqueous solutions by adsorption on zeolites with a modulus of up to 400.
    Type: Grant
    Filed: February 9, 1995
    Date of Patent: October 14, 1997
    Assignee: Degussa Aktiengesellschaft
    Inventors: Elfriede Sextl, Akos Kiss, Heike Kinz, Wiltrud Schaefer-Treffenfeldt, Sems Yonsel, Stefan Stockhammer
  • Process of the isolation of L-leucine and L-isoleucine from aqueous solutions
    Patent number: 5527958
    Abstract: A process for the isolation of L-leucine and L-isoleucine from an aqueous solution containing these amino acids and their separation from each other by contacting the solution with a zeolite under acid conditions.
    Type: Grant
    Filed: September 21, 1994
    Date of Patent: June 18, 1996
    Assignee: Degussa Aktiengesellschaft
    Inventors: Sems Yonsel, Wiltrud Schaffer-Treffenfeldt, Gerard Richet, Tien Le Quang, Elfriede Sextl, Mario Scholz
  • Process for the separation of amino acids from aqueous solutions
    Patent number: 5312980
    Abstract: A process for the separation of amino acids from aqueous solutions by adsorption on zeolites of different types. It is unnecessary to separate the biomass prior to the treatment.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: May 17, 1994
    Assignee: Degussa Aktiengesellschaft
    Inventors: Sems Yonsel, Wiltrud Schafer-Treffenfeldt, Akos Kiss, Elfriede Sextl, Heike Kinz