Patents by Inventor Kenichi Kashiwa

Kenichi Kashiwa 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 DL-tocopherols and intermediates therefor
    Patent number: 5600029
    Abstract: The present invention relates to a process for producing dl-tocopherols and intermediates for the production. dl-Tocopherols obtained by the present invention are useful compounds that are used as food additives, feed and medicaments.
    Type: Grant
    Filed: March 2, 1995
    Date of Patent: February 4, 1997
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Tatsuhiko Kaneko, Kenichi Kashiwa
  • Process for producing aldehyde derivatives
    Patent number: 5527952
    Abstract: The present invention provides a novel process for producing 4-acyloxy-2-methyl-2-buten-1-al readily in high yield from a readily available inexpensive industrial starting compound without using special reaction apparatuses and conditions.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: June 18, 1996
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Noritaka Kuroda, Tatsuhiko Kaneko, Kenichi Kashiwa
  • Process for producing .alpha.,.beta.-unsaturated aldehydes
    Patent number: 5471004
    Abstract: The present invention relates to a process for producing an .alpha.,.beta.-unsaturated aldehyde which comprises subjecting an allyl-hexamethylenetetraammonium derivative to hydrolysis in water and an organic solvent homogeneously immiscible with water. The resulting .alpha.,.beta.-unsaturated aldehyde is useful as medicaments, flavorings, etc., or as raw materials for their production.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: November 28, 1995
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Tatsuhiko Kaneko, Noritaka Kuroda, Kenichi Kashiwa