Patents by Inventor Hironobu Shigematu

Hironobu Shigematu 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).

  • Methods for production of crosslinked rubber products
    Patent number: 4983685
    Abstract: In a process of crosslinking a rubber compound with the usage of an organic peroxide as the crosslinking agent, is incorporated to the rubber compound in an amount of 0.5-20 parts by weight per 100 parts of a rubber substrate a compound selected from imidazole type compounds, thiourea type compounds, thiazole type compounds, thiuram type compounds, dithiocarbamate type compounds, phenol type compounds, triazole type compounds and amine type compounds. The process results no surface tackiness of the rubber product crosslinked in the presence of oxygen.
    Type: Grant
    Filed: June 4, 1987
    Date of Patent: January 8, 1991
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masashi Aoshima, Hironobu Shigematu, Mitsuhiko Sato