Patents by Inventor Shichiro Kawawata

Shichiro Kawawata 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).

  • Radioactive ray-resistant stabilizer
    Patent number: 4016135
    Abstract: A resin composition containing, as a radioactive ray-resistant stabilizer, an alkyl-substituted condensed tetracyclic hydrocarbon compound of the generic formula,[C.sub.16 H.sub.10 --R.sub.xwherein R denotes an alkyl group having one to four carbon atoms and x is an integer from 1 to 4, and when x is an integer of 2 or more, R may be the same or different.
    Type: Grant
    Filed: December 27, 1974
    Date of Patent: April 5, 1977
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masaaki Takahashi, Akira Ito, Shichiro Kawawata, Jiro Ogura