Patents by Inventor Tsutomu Kaku

Tsutomu Kaku 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).

  • Method of desilylating silylether compounds
    Patent number: 5821362
    Abstract: Method of desilylating a silylether compound by reacting a silylether compound of the general formula (I): ##STR1## or a salt thereof with an amine hydrogen fluoride salt or a pyridine hydrogen fluoride salt in an organic solvent to produce a compound of the general formula (IV): ##STR2## According to this method, silylether compounds that are labile under strong acidic or basic conditions can be desilylated efficiently using inexpensive reagents.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: October 13, 1998
    Assignee: Suntory Limited
    Inventors: Akira Kaneko, Tsutomu Kaku, Masaji Ishiguro, Takashi Nakatsuka
  • Synthesis of .alpha., .beta.-unsaturated-ketones
    Patent number: 4355184
    Abstract: .alpha., .beta.-unsaturated-ketones are synthesized by reacting with an aldehyde and an alkali metal salt of acetoacetic acid in the presence of an aliphatic secondary amine in the mixture of heterogeneous solvents producing an oil layer and a water layer.
    Type: Grant
    Filed: April 27, 1981
    Date of Patent: October 19, 1982
    Assignee: Nippon Soda Company Limited
    Inventors: Tsutomu Kaku, Kiyoshi Katsuura, Mikio Sawaki