Patents by Inventor Chika Ishida

Chika Ishida 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).

  • Mutant prenyl diphosphate synthase, DNA encoding mutant prenyl diphosphate synthase and process for producing mutant prenyl phosphate synthase
    Patent number: 6225096
    Abstract: Manufacture or use of a mutant prenyl diphosphate synthase in which the amino acid residue located at the fifth position in the N-terminal direction from D of the N-terminal of the aspartic acid-rich domain DDXX(XX)D (the two X's in the parentheses may not be present) present in the second region among the conserved regions of the prenyl diphosphate synthase has been substituted by another amino acid.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: May 1, 2001
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keishi Narita, Chika Ishida, Yoshie Takeuchi, Chikara Ohto, Shinichi Ohnuma, Tokuzo Nishino
  • Thermostable geranylgeranyl diphosphate synthase
    Patent number: 6107072
    Abstract: The present invention discloses a heat-resistant geranylgeranyl diphosphate synthase originating in Thermus thermophilus, along with its production process and its method of use.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: August 22, 2000
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Chika Ishida
  • Mutant prenyl diphosphate synthase
    Patent number: 6040165
    Abstract: Manufacture or use of a mutant prenyl diphosphate synthase in which the amino acid residue located at the fifth position in the N-terminal direction from D of the N-terminal of the aspartic acid-rich domain DDXX(XX)D (the two X's in the parentheses may not be present) present in the second region among the conserved regions of the prenyl diphosphate synthase has been substituted by another amino acid.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: March 21, 2000
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keishi Narita, Chika Ishida, Yoshie Takeuchi, Chikara Ohto, Shinichi Ohnuma, Tokuzo Nishino