Patents by Inventor Yu Ohashi

Yu Ohashi 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 production of ethers
    Patent number: 4391994
    Abstract: Oxyalkylene group of an alkylene oxide is inserted into a chain-type ether compound having at least one lower alkyl group by reacting the latter with the alkylene oxide in the presence of a catalyst prepared by mixing boron trifluoride and/or stannic chloride with an active-hydrogen compound exemplified by water or a lower aliphatic alcohol. The reaction results reduced formation of by-product dimer of the alkylene oxide even under an increased charging ratio of the alkylene oxide to the chain-type ether.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: July 5, 1983
    Assignee: Nisso Petrochemical Industrie Co., Ltd.
    Inventors: Kiyoshi Kogoma, Yu Ohashi, Jiro Niizeki, Norio Sone, Takashi Tobita
  • Process for the production of diethers
    Patent number: 4385190
    Abstract: A process for the production of a mono- or poly-alkylene glycol diether which consists of reacting an ether having at least one lower alkyl group with alkylene oxide in the presence of a heteropoly acid or a heteropoly acid acidic salt. Heteropoly acids and their acidic salts whose ratio of the hetero and coordinate atom is 1:6 and 1:12 are preferably used.
    Type: Grant
    Filed: May 11, 1981
    Date of Patent: May 24, 1983
    Assignee: Nisso Petrochemical Industry Company Limited
    Inventors: Yu Ohashi, Norio Sone, Takashi Tobita