Patents by Inventor Yasuhiro Chigira

Yasuhiro Chigira 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).

  • Process for producing steroidal compounds
    Patent number: 3994938
    Abstract: Steroidal 19-nor-3-hydroxy-1, 3, 5(10)-trienes are produced by a process which comprises admixing a preheated hydrocarbon and a solution of a steroidal 10-methyl-1, 4-diene-3-one dissolved or suspended in a hydrocarbon, and then pyrolyzing said steroidal compound.
    Type: Grant
    Filed: August 8, 1975
    Date of Patent: November 30, 1976
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Ken-ichi Wakabayashi, Yasuhiro Chigira, Kaoru Fukuda