Patents by Inventor Tatsuji Chuman

Tatsuji Chuman 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).

  • Periplanone-B analogues as well as cockroach attractant
    Patent number: 5126128
    Abstract: Periplanone-B analogue of (4E, 8R, 9R, 10R)-8,9-epoxy-5-methyl-10,10-methylene-oxy-4-cyclodecen-1-one, suitable as cockroach attractant can be prepared by reacting 6-methyl-2,6-cyclodecadien-1-one with a silylating reagent under the presence of a basic catalyst to form a silyldienol ether, reacting the resultant ether with an organic peracid to obtain (2Z, 6E)-10-hydroxy-6-methyl-2,6-cyclodecadien-1-one, reacting the resultant product with a peroxide under the presence of a basic catalyst after protecting hydroxy groups thereof with protection groups to obtain an epoxide, reacting the epoxide with chloromethyl lithium or dimethyl sulfonium methylide thereby introducing a spiroepoxy group and then removing the protection groups, to obtain (1S, 4E, 8R, 9R, 10S)-8,9-epoxy-5-methyl-10,10-methyleneoxy-4-cyclodecen-1-ol and, further, oxidizing the resultant product with a chromic acid type or dimethyl sulfoxide type oxidizing agents.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: June 30, 1992
    Assignee: Japan Tobacco Inc.
    Inventors: Masataka Mori, Kentaro Okada, Kazuko Shimazaki, Tatsuji Chuman
  • Method of attracting Tribolium confusum J. using 2,6-dimethyl-1-octanol
    Patent number: 5063058
    Abstract: An attractant having attraction activity for to Tribolium confusum J., which contains 2,6-dimethyl-1-octanol as a component exhibiting an attraction activity. 2,6-dimethyl-octanol can be diluted with an appropriated solvent, or carried by an appropriate solid-phase carrier in the form of tablets. The attactant can be effectively used in lure trapping.
    Type: Grant
    Filed: April 23, 1990
    Date of Patent: November 5, 1991
    Assignee: Japan Tobacco Inc.
    Inventors: Tatsuji Chuman, Mikio Ono
  • Method of attracting Tribolium castaneum Herbst with 2,6-dimethyl-octly formate
    Patent number: 4970069
    Abstract: According to the present invention, an attractant that possesses attraction effects with respect to Tribolium castaneum Herbst and moreover, is a stable compound for which the effectiveness will be continuous, is provided.That is, the present invention is 2,6-dimethyl octylformate and an atrractant of Tribolium castaneum Herbst which is formed from relevant chemical compounds.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: November 13, 1990
    Assignee: Japan Tobacco, Inc.
    Inventors: Masahiro Kono, Tatsuji Chuman, Takane Fujimori, Kenji Mori, Shigefumi Kuwahara
  • 6,12-dimethylpentadecan-2-one and its use in monitoring and controlling the banded cucumber beetle
    Patent number: 4871537
    Abstract: A pheromonal compound produced by the banded cucumber beetle has been identified as 6,12-dimethylpentadecan-2-one. Both the synthetically prepared racemic compound and the purified natural pheromone elicited responses by banded cucumber males in field tests. By attracting adult beetles to field traps, this compound is a useful tool for the monitoring and controlling of this major agricultural pest.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: October 3, 1989
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Tatsuji Chuman, Paul L. Guss, deceased, Robert E. Doolittle, John R. McLaughlin, James H. Tumlinson, III
  • 4-6-Dimethyl-7-keto-nonan-3-ol and sex attractant comprising the same
    Patent number: 4317836
    Abstract: A novel compound, 4,6-dimethyl-7-keto-nonan-3-ol is extracted from female imagoes of cigarette beetle. This novel compound is the sex pheromone of cigarette beetle and has sex attracting activity to male imagoes. A sex attracting composition comprises the novel compound and a solid carrier. The compound may be impregnated or adsorbed in the carrier.
    Type: Grant
    Filed: January 30, 1980
    Date of Patent: March 2, 1982
    Assignee: The Japan Tobacco & Salt Public Corporation
    Inventors: Tatsuji Chuman, Masahiro Kono, Kunio Kato