Patents by Inventor Charles I. Sih

Charles I. Sih 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(s)-.alpha.-methylarylacetic acids
    Patent number: 5587318
    Abstract: The invention relates to a process for preparing (S)-.alpha.-methylarylacetic acids from mixtures, such as racemic mixtures, of (R)- and (S)-.alpha.-methylarylacetic acid esters by enantiospecific hydrolysis using extracellular lipases of microbial origin (EC 3.1.1.3).
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: December 24, 1996
    Assignee: Wisconsin Alumni Research Foundation
    Inventor: Charles I. Sih
  • Process for preparing (S)-.alpha.-methylarylacetic acids
    Patent number: 5322791
    Abstract: The invention relates to a process for preparing (S)-.alpha.-methylarylacetic acids from mixtures, such as racemic mixtures, of (R)- and (S)-.alpha.-methylarylacetic acid esters by enantiospecific hydrolysis using extracellular lipases of microbial origin (EC 3.1.1.3).
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: June 21, 1994
    Assignee: Wisconsin Alumni Research Foundation
    Inventor: Charles I. Sih
  • Process for preparing L-carnitine from DL-carnitine
    Patent number: 4751182
    Abstract: This invention relates to a process for resolving DL-carnitine by contacting a racemic mixture of DL-carnitine with a microorganism which preferentially metabolizes D-carnitine and permits accumulation of L-carnitine in the reaction medium and to novel strains of such microorganisms and mutants of such strain.
    Type: Grant
    Filed: December 2, 1985
    Date of Patent: June 14, 1988
    Assignee: Wisconsin Alumni Research Foundation
    Inventor: Charles I. Sih