Patents by Inventor Shigeo Toida

Shigeo Toida 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 recovering molybdenum, vanadium, cobalt and nickel from roasted products of used catalysts from hydrotreatment desulfurization of petroleum
    Patent number: 4145397
    Abstract: From roasted products of used catalysts from hydrotreatment desulfurization of petroleum, valuable molybdenum, vanadium, cobalt and nickel are recovered easily and a high percent recovery by means of a combination of simple chemical procedures and also inexpensive chemicals. The recovered metal components can be reused for preparing new catalysts and the like.
    Type: Grant
    Filed: August 3, 1977
    Date of Patent: March 20, 1979
    Assignees: Marubeni Corporation, Fuji Fine Chemical Co. Ltd.
    Inventors: Shigeo Toida, Akira Ohno, Kozo Higuchi, deceased, by Makoto Higuchi, heir at law, by Yuko Higuchi, heir at law