Patents by Inventor Syuzi Tsuchiya

Syuzi Tsuchiya 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 preparing optically active 2-(4-hydroxy-phenoxy) propionic acid compounds
    Patent number: 4625053
    Abstract: A process for preparing an optically active 2-(4-hydroxyphenoxy)propionic acid compound, which comprises reacting an optically active compound having the formula: ##STR1## wherein X is a chlorine atom or a bromine atom, and M is a hydrogen atom or an alkali metal atom, with hydroquinone or an alkali metal salt of hydroquinone, in the presence of an alkali metal hydroxide and water, and precipitating optically active disodium 2-(4-hydroxyphenoxy)propionate.
    Type: Grant
    Filed: November 6, 1985
    Date of Patent: November 25, 1986
    Assignee: Nissan Chemical Industries Ltd.
    Inventors: Shoji Fujinawa, Isao Hashiba, Kenji Suzuki, Syuzi Tsuchiya, Yasuo Takakuwa