Patents by Inventor Shinji Nii

Shinji Nii 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 bishalophenyl disulfide
    Patent number: 6646165
    Abstract: This invention is directed to a process for producing a bishalophenyl disulfide, chracterized by reacting a halothiophenol with an alkali metal hydroxide to obtain an alkali metal halothiophenolate and subsequently converting the halothiophenolate into a disulfide with an oxidizing agent in the presence of a mineral acid. By the process, a bishalophenyl disulfide having a high purity can be industrially produced in high yield.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: November 11, 2003
    Assignee: Sumitomo Seika Chemicals Co., Ltd.
    Inventors: Takehiro Hiyama, Hitoshi Karino, Shinji Nii
  • Process for producing bishalophenyl disulfide
    Publication number: 20030060665
    Abstract: This invention is directed to a process for producing a bishalophenyl disulfide, chracterized by reacting a halothiophenol with an alkali metal hydroxide to obtain an alkali metal halothiophenolate and subsequently converting the halothiophenolate into a disulfide with an oxidizing agent in the presence of a mineral acid. By the process, a bishalophenyl disulfide having a high purity can be industrially produced in high yield.
    Type: Application
    Filed: September 20, 2002
    Publication date: March 27, 2003
    Inventors: Takehiro Hiyama, Hitoshi Karino, Shinji Nii