Patents by Inventor Tokuzo Kurata

Tokuzo Kurata 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 hydrating a nitrile to the corresponding amide
    Patent number: 3966810
    Abstract: A process for catalytically hydrating a nitrile to the corresponding amide by using a copper catalyst prepared by decomposing copper hydride.
    Type: Grant
    Filed: June 6, 1975
    Date of Patent: June 29, 1976
    Inventors: Tokuzo Kurata, Takeshi Okano, Akio Tamaru, Yozo Kato, Saburo Nagashima
  • Process for preparing concentrated titanium mineral
    Patent number: 3959465
    Abstract: Titanium minerals are concentrated by leaching with an acid leaching agent in the presence of a chelating agent, sulfonate surfactant or polyacrylamide surfactant, wherein the iron components are removed from the minerals.
    Type: Grant
    Filed: May 24, 1974
    Date of Patent: May 25, 1976
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Tokuzo Kurata, Satoshi Emi, Kunihiko Ofuchi, Tsutomu Takeuchi, Isamu Sone
  • Process for hydrating an unsaturated nitrile
    Patent number: 3939205
    Abstract: A copper catalyst obtained by reducing a copper compound with formaldehyde in the presence of an alkali in an aqueous medium is an excellent catalyst for the hydrolysis of an unsaturated nitrile to an amide. Furthermore, when a copper compound is combined with another element, which is selected from a specific group of elements, during the preparation of the copper catalyst, a catalyst is formed which has an increased hydrolysis activity and an increased catalyst lifetime.
    Type: Grant
    Filed: November 17, 1972
    Date of Patent: February 17, 1976
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Tokuzo Kurata, Takeshi Okano, Kunihiko Ohfuchi, Akio Tamaru, Yoshifumi Murata, Saburo Nagashima