Patents by Inventor Masatoshi Sasa

Masatoshi Sasa 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 preparation of granular .mu.-sulfur having improved flowability, as a vulcanizing agent of rubber composition
    Patent number: 5290321
    Abstract: An organic solvent alone or together with a rubber process oil is added to a powder of .mu.-sulfur, the mixture is granulated, and the granulation product is heated at a temperature lower than 120.degree. C. to evaporate the organic solvent, whereby granular .mu.-sulfur having an improved flowability is obtained. This granular .mu.-sulfur is valuable as a rubber-vulcanizing agent.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: March 1, 1994
    Assignee: Shikoku Chemicals Corporation
    Inventors: Yukihiro Koga, Tadahiko Matsuoka, Masatoshi Sasa