Patents by Inventor Toshiharu Kanagae

Toshiharu Kanagae 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 aromatic hydroxycarboxylic acids
    Patent number: 4780567
    Abstract: This invention provides a process for selectively producing aromatic hydroxycarboxylic acids, which comprises subjecting a liquid mixture consisting of a polycyclic aromatic hydrocarbon, an alkali metal salt of an aromatic hydroxy compound and a free aromatic hydroxy compound to a reaction with carbon dioxide. The process permits the production of the intended product with enhanced selectivity.
    Type: Grant
    Filed: July 1, 1986
    Date of Patent: October 25, 1988
    Assignee: Kabushiki Kaisha Ueno Seiyaku Oyo Kenkuyo
    Inventors: Ryuzo Ueno, Toshiharu Kanagae, Mitsuyuki Kishimoto