Patents by Inventor Haruki Tsuruta

Haruki Tsuruta 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).

  • N-(l-aspartyl)amino alcohol derivative and sweetener containing the same
    Patent number: 5463118
    Abstract: (2R,3R)-3-N-(L-aspartyl)amino-1-(1-methyl-2-norbornyl)-2-butanol and (2R,3R)-3-N-(L-aspartyl)amino-1-(3-methyl-2-norbornyl)-2-butanol as well as a sweetener comprising the same are disclosed. These compounds, which have excellent sweetness characteristics and are stable in acidic aqueous solutions, are highly useful as a sweetener in various fields.
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: October 31, 1995
    Assignee: Takasago International Corporation
    Inventors: Yoshifumi Yuasa, Yoshiki Okeda, Akio Tachikawa, Akira Nagakura, Haruki Tsuruta
  • Ferroelectric smectic liquid crystal compound and composition containing the same
    Patent number: 5049308
    Abstract: A liquid crystal compound represented by formula: ##STR1## wherein R.sub.1 represents a straight chain alkyl group having from 4 to 18 carbon atoms; R.sub.2 represents a straight chain alkyl group having from 2 to 6 carbon atoms or a branched alkyl group having from 3 to 6 atoms and having a methyl group as a side chain; and m and n each represents 1 or 2, is disclosed.The liquid crystal compound of formula (I) is optically and electrically stable and exhibits fast electro-optical switching in image display.
    Type: Grant
    Filed: June 27, 1989
    Date of Patent: September 17, 1991
    Assignee: Takasago International Corporation
    Inventors: Shigeru Mitsuhashi, Hitoshi Kondo, Tetsuharu Okazaki, Shinji Endoh, Hiroko Kudo, Akio Yamaguchi, Haruki Tsuruta, Susumu Akutagawa
  • Ferroelectric smectic liquid crystal compound and composition containing the same
    Patent number: 4886623
    Abstract: A liquid crystal compound represented by formula: ##STR1## wherein R.sub.1 represents a straight chain alkyl group having from 4 to 18 carbon atoms; R.sub.2 represents a straight chain alkyl group having from 2 to 6 carbon atoms or a branched alkyl group having from 3 to 6 atoms and having a methyl group as a side chain; and m and n each represents 1 or 2, is disclosed.The liquid crystal compound of formula (I) is optically and electrically stable and exhibits fast electro-optical switching in image display.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: December 12, 1989
    Assignee: Takasago International Corporation
    Inventors: Shigeru Mitsuhashi, Hitoshi Kondo, Tetsuharu Okazaki, Shinji Endoh, Hiroko Kudo, Akio Yamaguchi, Haruki Tsuruta, Susumu Akutagawa
  • 1,1,4,4-tetraphenyl-1,3-butadiene derivative and electrophotographic light-sensitive material using the same
    Patent number: 4751163
    Abstract: A 1,1,4,4-tetraphenyl-1,3-butadiene derivatives represented by formula (I): ##STR1## wherein R.sub.1 represents a di-lower alkylamino group, and R.sub.2 represents a hydrogen atom or a di-lower alkylamino group, is disclosed, which has useful characteristics such as excellent static charge retention ability. An electrophotographic light-sensitive material using the foregoing derivative can satisfy the requirements, e.g., for high sensitivity, low residual potential, less light fatigue even after repeated use, and excellent durability.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: June 14, 1988
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Toshimitsu Hagiwara, Haruki Tsuruta
  • Perfume composition
    Patent number: 4434306
    Abstract: A perfume composition is described, which contains at least one compound of bicyclo[2,2,2]octane and bicyclo[2,2,2]octene derivatives represented by the general formula (I) ##STR1## wherein the symbols are the same as defined hereinbefore.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: February 28, 1984
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Toyohiko Kobayashi, Haruki Tsuruta
  • Process for preparing brassylic diester
    Patent number: 4310685
    Abstract: A process for preparing a brassylic diester of the formula:ROOC--CH.sub.2).sub.11 COORwherein R is a lower alkyl group by hydrocracking 6,6'-methylenebis-(6-hexanolide) in an alcohol of the formula:ROH(wherein R is as defined above) in the presence of a metal catalyst and an acid catalyst. A process for producing the hexanolide is also disclosed.
    Type: Grant
    Filed: February 21, 1980
    Date of Patent: January 12, 1982
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Kiyohito Sawano, Toyohiko Kobayashi, Haruki Tsuruta
  • Norbornane and norbornene derivatives
    Patent number: 4229600
    Abstract: A norbornane or norbornene derivative of the formula (I): ##STR1## wherein the bond represented by the dotted line is present or absent and n is 0 or 1, the norbornane and norbornene derivatives having a characteristic odor of sandalwood oil and useful for perfumery; and a process for the production thereof.
    Type: Grant
    Filed: July 28, 1978
    Date of Patent: October 21, 1980
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Toyohiko Kobayashi, Haruki Tsuruta, Toshio Yoshida
  • Chewing gum base containing a thermally decomposed product of a natural rubber and a method of preparation thereof
    Patent number: 4202906
    Abstract: A chewing gum base containing natural rubber, basic gum additives and a decomposition product obtained by thermally decomposing natural rubber at a temperature of 200.degree. C. to 350.degree. C. in an inert atmosphere and removing low boiling point fractions up to 160.degree. C. at a pressure of approximately 1 mm Hg.
    Type: Grant
    Filed: October 5, 1978
    Date of Patent: May 13, 1980
    Assignees: Lotte Co., Ltd., Takasago Perfumery Co., Ltd.
    Inventors: Koichi Ogawa, Shichigoro Tezuka, Yoshinori Sato, Michio Moroe, Haruki Tsuruta, Toshio Yoshida