Patents by Inventor Tadao Terasawa

Tadao Terasawa 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).

  • Novel type of oxa- and thia-steroids
    Patent number: 4130565
    Abstract: 16-Oxa- and 16-thia-D-homo-estrogen derivatives useful as postcoital oral contraceptives which are produced by total synthesis from 1-vinyltetralin-1-ols or their thiuronium derivatives on reactions with 4-substituted tetrahydropyran- or tetrahydrothiopyran-3,5-diones, and subsequent appropriate modifications.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: December 19, 1978
    Assignee: Shionogi & Co., Ltd.
    Inventors: Tadao Terasawa, Toshihiko Okada
  • Oxa- and thia-steroids
    Patent number: 4083852
    Abstract: 16-Oxa- and 16-thia-D-homo-estrogen derivatives useful as postcoital oral contraceptives which are produced by total synthesis from 1-vinyltetralin-1-ols or their thiuronium derivatives on reactions with 4-substituted tetrahydropyran- or tetrahydrothiopyran-3,5-diones, and subsequent appropriate modifications.
    Type: Grant
    Filed: November 5, 1976
    Date of Patent: April 11, 1978
    Assignee: Shionogi & Co., Ltd.
    Inventors: Tadao Terasawa, Toshihiko Okada