Patents by Inventor Sinichi Yasuda

Sinichi Yasuda 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 treating aqueous solutions containing phenols
    Patent number: 4418221
    Abstract: In removing a phenol from an aqueous solution containing the phenol, the phenol could be extracted quite effectively regardless of concentration of the phenol by using, as extracting solvent, a nitrogen-containing heterocyclic compound having a total carbon number of 9 or more either alone or in the state of a dilution with a water-insoluble organic solvent.
    Type: Grant
    Filed: March 12, 1982
    Date of Patent: November 29, 1983
    Assignee: Koei Chemical Co., Ltd.
    Inventors: Sinichi Yasuda, Takayuki Kurohara, Akira Taguro
  • Method for adsorbing and recovering phenols
    Patent number: 4303531
    Abstract: The present invention relates to a: (a) material for adsorbing and recovering phenols which comprises as its main component a cross-linked polyvinylpyridine resin and (b) a method of recovering phenols using the above material.
    Type: Grant
    Filed: November 27, 1979
    Date of Patent: December 1, 1981
    Assignee: Koei Chemical Co., Ltd.
    Inventors: Nariyoshi Kawabata, Sinichi Yasuda