Patents by Inventor Toshinari Tenno

Toshinari Tenno 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 the desulfurization of sulfur-containing compositions by hydrothermal reaction
    Patent number: 5639934
    Abstract: A process for the desulfurization of a sulfur-containing composition is described. The process comprises providing a sulfur-containing composition, adding an aqueous medium and a sulfur absorbent to the composition, and subjecting the resultant mixture to hydrothermal reaction under specific conditions to obtain a desulfurized product. When the sulfur-containing composition is made of vulcanized rubbers, the rubber can be converted into oily substances by treating the rubber product under supercritical conditions using an aqueous medium. The conversion reaction is facilitated by addition of metal oxides or salts.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: June 17, 1997
    Assignees: Nakamichi Yamasaki, Nishikawa Rubber Co., Ltd.
    Inventors: Nakamichi Yamasaki, Kenji Tsuda, Hiroyuki Okuda, Toshinari Tenno
  • Process for the conversion of vulcanized rubbers into oils by use of supercritical aqueous fluids
    Patent number: 5502262
    Abstract: A process for the desulfurization of a sulfur-containing composition is described. The process comprises providing a sulfur-containing composition, adding an aqueous medium and a sulfur absorbent to the composition, and subjecting the resultant mixture to hydrothermal reaction under specific conditions to obtain a desulfurized product. When the sulfur-containing composition is made of vulcanized rubbers, the rubber can be converted into oily substances by treating the rubber product under supercritical conditions using an aqueous medium. The conversion reaction is facilitated by addition of metal oxides or salts.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: March 26, 1996
    Assignees: Nakamichi Yamasaki, Nishikawa Rubber Co., Ltd.
    Inventors: Nakamichi Yamasaki, Kenji Tsuda, Hiroyuki Okuda, Toshinari Tenno