Patents by Inventor Takeharu Tsuge

Takeharu Tsuge 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).

  • Polyhydroxyalkanoic acid copolymer and process for preparing same
    Patent number: 8394613
    Abstract: A PHA copolymer comprising (R)-3-hydroxy-4-methyl valeric acid units and a production method thereof are provided. A polyhydroxyalkanoic acid copolymer comprising at least (R)-3-hydroxy-4-methyl valeric acid units; and a method of producing a polyhydroxyalkanoic acid copolymer comprising at least (R)-3-hydroxy-4-methyl valeric acid units, wherein in the presence of a carbon source and a precursor of (R)-3-hydroxy-4-methyl valeric acid, a transformant in which the gene of polyhydroxyalkanoic acid-polymerizing enzyme has been introduced in a microorganism selected from Escherichia coli, Ralstoniau sp., and Pseudomonas sp. is cultured, and from the culture obtained a polyhydroxyalkanoic acid copolymer comprising at least (R)-3-hydroxy-4-methyl valeric acid units is collected.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: March 12, 2013
    Assignee: Tokyo Institute of Technology
    Inventors: Takeharu Tsuge, Tetsuya Yamamoto, Asahi Kitagawa
  • POLYHYDROXYALKANOIC ACID COPOLYMER AND PROCESS FOR PREPARING SAME
    Publication number: 20110081692
    Abstract: A PHA copolymer comprising (R)-3-hydroxy-4-methyl valeric acid units and a production method thereof are provided. A polyhydroxyalkanoic acid copolymer comprising at least (R)-3-hydroxy-4-methyl valeric acid units; and a method of producing a polyhydroxyalkanoic acid copolymer comprising at least (R)-3-hydroxy-4-methyl valeric acid units, wherein in the presence of a carbon source and a precursor of (R)-3-hydroxy-4-methyl valeric acid, a transformant in which the gene of polyhydroxyalkanoic acid-polymerizing enzyme has been introduced in a microorganism selected from Escherichia coli, Ralstoniau sp., and Pseudomonas sp. is cultured, and from the culture obtained a polyhydroxyalkanoic acid copolymer comprising at least (R)-3-hydroxy-4-methyl valeric acid units is collected.
    Type: Application
    Filed: April 22, 2009
    Publication date: April 7, 2011
    Applicant: TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Takeharu Tsuge, Tetsuya Yamamoto, Asahi Kitagawa