Patents by Inventor Kunihiro Shimamoto

Kunihiro Shimamoto 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).

  • Patent number: 6300498
    Abstract: The 1,5′-bitetrazole of the invention comprises 1,5′-bitetrazole, and ammonia or an amine. The 1,5′-bitetrazole of the invention decomposes sharply and generates a nontoxic gas.
    Type: Grant
    Filed: July 23, 1999
    Date of Patent: October 9, 2001
    Assignee: Toyo Kasei Kogyo Company Limited
    Inventors: Hiroaki Tanaka, Kunihiro Shimamoto, Atuhiro Onishi
  • Patent number: 4493938
    Abstract: This invention is concerned with a method for the production of thioalkylene glycols by using the reaction solvent containing mainly the thioalkylene glycol, the product of the reaction of alkylene oxide and hydrogen sulfide, without using any other special solvent or inert solvent, in the presence of anion exchange resin as the catalyst, the method which enables the simple, economical and high-yield production of thioalkylene glycols because a high pressure is not necessarily required and the purification and isolation are carried out very easily.For example, according to this invention, thioethylene glycol was obtained in a 91% yield from ethylene oxide and hydrogen sulfide in the mixture of thioethylene glycol and thiodiethylene glycol as the solvent in the presence of the anion exchange resin as the catalyst. Similarly, thiopropylene glycol in a 95% yield from propylene oxide and hydrogen sulfide in thiopropylene glycol as the solvent, and thio-.alpha.-butylene glycol in a 94% yield from .alpha.
    Type: Grant
    Filed: April 10, 1981
    Date of Patent: January 15, 1985
    Assignee: Toyo Kasei Kogyo Co., Ltd.
    Inventors: Kunihiro Shimamoto, Hiroshi Hatanaka, Shinichiro Seki, Ryozo Orita