Patents by Inventor Katsuro Kubo

Katsuro Kubo 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).

  • Anthracycline antibiotics
    Patent number: 4612371
    Abstract: Novel anthracycline antibiotics characteristic of Ring A of the anthracycline skeleton are produced by microorganisms belonging to the genus Streptomyces and are useful as anti-cancer agents.
    Type: Grant
    Filed: July 18, 1985
    Date of Patent: September 16, 1986
    Assignee: Sanraku Incorporated
    Inventors: Akihiro Yoshimoto, Shizuka Fujii, Katsuro Kubo, Tomoyuki Ishikura, Tsutomu Sawa, Tomio Takeuchi, Hamao Umezawa
  • Phosphoric ester of antibiotic OA-6129
    Patent number: 4508648
    Abstract: Novel phosphoric ester of antibiotic OA-6129 presented by the formula ##STR1## wherein R is a hydrogen atom, hydroxyl or hydroxysulfonyloxy, and its salts and the preparation method thereof.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: April 2, 1985
    Assignee: Sanraku-Ocean Co., Ltd.
    Inventors: Katsuro Kubo, Takeo Yoshioka, Mitsuyasu Okabe, Yasuo Fukagawa, Tomoyuki Ishikura
  • Amidohydrolase having ability to depantothenylate an antibiotic
    Patent number: 4438201
    Abstract: A novel enzyme, amidohydrolase, having the ability to depantothenylate antibiotic OA-6129A represented by the following formula ##STR1## but no substantial ability to deacetylate antibiotic PS-5 represented by the following formula ##STR2##
    Type: Grant
    Filed: July 1, 1982
    Date of Patent: March 20, 1984
    Assignee: Sanraku-Ocean Co., Ltd.
    Inventors: Katsuro Kubo, Yasuo Fukagawa, Tomoyuki Ishikura