Patents by Inventor Keisuke Hatakeyama

Keisuke Hatakeyama 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).

  • Method for producing (1S,2R)-2-chloro-2-fluorocyclopropanecarboxylic acid
    Patent number: 8409831
    Abstract: The present invention provides a method for producing (1S,2R)-2-chloro-2-fluorocyclopropanecarboxylic acid with a high yield and high selectivity. Specifically, disclosed is a method for producing (1S,2R)-2-chloro-2-fluorocyclopropanecarboxylic acid, wherein (1S)-2-chloro-2-fluorocyclopropanecarboxylic acid ester is hydrolyzed using an esterase derived from Burkholderia cepacia.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: April 2, 2013
    Assignees: Sumitomo Chemical Company, Limited, Daiichi Sankyo Company, Limited
    Inventors: Keisuke Hatakeyama, Takashi Miki, Norihiko Hirata
  • METHOD FOR PRODUCING (1S,2R)-2-CHLORO-2-FLUOROCYCLOPROPANECARBOXYLIC ACID
    Publication number: 20110117616
    Abstract: The present invention provides a method for producing (1S,2R)-2-chloro-2-fluorocyclopropanecarboxylic acid with a high yield and high selectivity. Specifically, disclosed is a method for producing (1S,2R)-2-chloro-2-fluorocyclopropanecarboxylic acid, wherein (1S)-2-chloro-2-fluorocyclopropanecarboxylic acid ester is hydrolyzed using an esterase derived from Burkholderia cepacia.
    Type: Application
    Filed: July 7, 2009
    Publication date: May 19, 2011
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Keisuke Hatakeyama, Takashi Miki, Norihiko Hirata