Patents by Inventor Kozo Tsunoda

Kozo Tsunoda 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 of locating work in automatic exposing apparatus
    Patent number: 5390025
    Abstract: A work locating method for an automatic exposing apparatus is provided.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: February 14, 1995
    Assignee: ORC Manufacturing Co., Ltd.
    Inventors: Akira Morita, Kozo Tsunoda, Takehiko Okamura
  • Process for preparing 8,2'-O-anhydropurine nucleosides
    Patent number: 4112221
    Abstract: Process for preparing 8,2'-O-anhydropurine nucleosides having a utility as intermediates for antiviral and anticarcinogenic drugs which comprises heating 2',3'-O-sulfinyl-8-oxypurine nucleosides in an aprotic polar solvent in the presence of an alkali metal, alkaline earth metal or ammonium salt of an inorganic or organic weak acid.
    Type: Grant
    Filed: July 10, 1975
    Date of Patent: September 5, 1978
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Kozo Tsunoda, Tsuneo Sowa, Kunio Iitsuka, Kiyohide Sako
  • 2,3-O-sulfinyl-cytidine-5-phosphate
    Patent number: 4016352
    Abstract: A process for preparing 2,2'-anhydrocytidine-5'-phosphate having an antitumor activity for cytidine-5'-phosphate which comprises heating a novel intermediate 2',3'-O-sulfinylcytidine-5'-phosphate in water, an aprotonic polar solvent or a cyclic tertiary amine, and a novel intermediate, 2',3'-O-sulfinyl-cytidine-5'-phosphate represented by the formula (I) ##STR1## and a process for preparing the intermediate 2',3'-O-sulfinyl-cytidine-5'-phosphate which comprises reacting cytidine-5'-phosphate with a thionyl halide in a polar organic solvent in the presence of a cyclic tertiary amine.
    Type: Grant
    Filed: March 13, 1975
    Date of Patent: April 5, 1977
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Kozo Tsunoda, Tsuneo Sowa, Kiyohide Sako