Patents by Inventor Hidetoshi Koga

Hidetoshi Koga 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).

  • Patent number: 6951693
    Abstract: Materials for organic electroluminescence devices represented by following general formula [1]: wherein A represents a substituted or unsubstituted arylene group having 22 to 60 carbon atoms, X1 to X4 each independently represent a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, X1 and X2 may be bonded to each other, X3 and X4 may be bonded to each other, Y1 to Y4 each independently represent an organic group represented by general formula [2], a to d each represent an integer of 0 to 2 and, when the arylene group represented by A has 26 or less carbon atoms, a+b+c+d>0 and the arylene group does not contain two or more anthracene nucleus; general formula [2] being: wherein R1 to R4 each independently represent hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, cyano group or form a triple bond by a linkage of R1 and R2 or R3 and R4, Z represents a substituted or unsu
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: October 4, 2005
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Chishio Hosokawa, Masakazu Funahashi, Hisayuki Kawamura, Hiromasa Arai, Hidetoshi Koga, Hidetsugu Ikeda
  • Publication number: 20050038296
    Abstract: Materials for organic electroluminescence devices are represented by following general formula [1]: general formula [1] wherein A represents a chrysene group X1 to X4 each independently represent a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, X1 and X2 may be bonded to each other, X3 and X4 may be bonded to each other, Y1 to Y4 each independently represent an organic group represented by general formula [2], a to d each represent an integer of 0 to 2 and, a+b+c+d?0; general formula [2] being: general formula [2] wherein R1 to R4 each independently represent hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, cyano group or form a triple bond by a linkage of R1 and R2 or R3 and R4, Z represents a substituted or unsubstituted aryl group having 6 to 20 carbon atoms and n represents 0 or 1.
    Type: Application
    Filed: April 1, 2004
    Publication date: February 17, 2005
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Chishio Hosokawa, Masakazu Funahashi, Hisayuki Kawamura, Hiromasa Arai, Hidetoshi Koga, Hidetsugu Ikeda
  • Publication number: 20040181102
    Abstract: A fluid for traction drives for automobiles which comprises (A) a hydrocarbon compound having two bridged rings selected from bicyclo[2.2.1]heptane ring, bicyclo[3.2.1]octane ring, bicyclo[3.3.0]octane ring and bicyclo[2.2.2]octane ring and (B) a hydrocarbon compound having at least one structure selected from quaternary carbon atom and ring structures and having a kinematic viscosity at 40° C. of 10 mm2/s or smaller, and has a viscosity at −40° C. of 40,000 Pa·s or smaller and a flash point of 140° C. or higher, is provided. This fluid exhibits a great traction coefficient at high temperatures and very small viscosity at low temperatures. A fluid for traction drives which comprises a specific bicyclo[2,2,1]heptane derivative having 14 to 17 carbon atoms and having a viscosity index of 0 or greater is also provided.
    Type: Application
    Filed: February 6, 2004
    Publication date: September 16, 2004
    Inventors: Yukio Yoshida, Toshiyuki Tsubouchi, Motohisa Ido, Hidetoshi Koga
  • Patent number: 6743948
    Abstract: Materials for organic electroluminescence devices are represented by following general formula [1]:  wherein B represents a substituted or unsubstituted arylene group having 6 to 60 carbon atoms, X1 to X4 each independently represent a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, X1 and X2 may be bonded to each other, X3 and X4 may be bonded to each other, Y1 to Y4 each independently represent an organic group represented by general formula [2], a to d each represent an integer of 0 to 2 and, when the arylene group represented by B has 26 or less carbon atoms, a+b+c+d>0 and at least one of the groups represented by B, X1, X2, X3 and X4 has a chrysene nucleus; general formula [2] being:
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: June 1, 2004
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Chishio Hosokawa, Masakazu Funahashi, Hisayuki Kawamura, Hiromasa Arai, Hidetoshi Koga, Hidetsugu Ikeda
  • Publication number: 20040014617
    Abstract: Disclosed is a lubricant base oil composition that comprises (a) from 80 to 98% by mass of a naphthenic synthetic lubricant base oil having a flash point of not lower than 140° C. and (b) from 2 to 20% by mass of an alcohol/fatty acid ester having a flash point of not lower than 150° C. of which the alcohol has a gem-type dimethyl structure, or comprises (a) from 85 to 99% by mass of a naphthenic synthetic lubricant base oil having a flash point of not lower than 140° C. and (c) from 1 to 15% by mass of a mineral oil having a kinematic viscosity at 40° C. of from 0.9 to 9.6 mm2/sec, a boiling point under normal pressure of from 150 to 400° C. and a % CA measured through ring analysis (in n-d-M process) of at most 10%.
    Type: Application
    Filed: February 27, 2003
    Publication date: January 22, 2004
    Inventors: Hidetoshi Koga, Hitoshi Hata, Toshiyuki Tsubouchi
  • Publication number: 20030072966
    Abstract: Materials for organic electroluminescence devices and organic electroluminescence devices which exhibit high efficiency of light emission and have a long life and excellent heat resistance, novel compounds and processes for producing the materials for organic electroluminescence devices are provided.
    Type: Application
    Filed: June 26, 2002
    Publication date: April 17, 2003
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Chishio Hosokawa, Masakazu Funahashi, Hisayuki Kawamura, Hiromasa Arai, Hidetoshi Koga, Hidetsugu Ikeda
  • Patent number: 6489046
    Abstract: An organic electroluminescence device which exhibits an excellent purity of color and a high efficiency of light emission, has a long life and emits reddish light and a novel compound having these characteristics.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: December 3, 2002
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Hidetsugu Ikeda, Hidetoshi Koga, Yoshinori Yanagisawa, Sanae Tagami
  • Patent number: 5420352
    Abstract: 1-Methyl-2-phenoxy ethanol of the formula, ##STR1## [wherein R is hydrogen or an alkyl group having 1 to 6 carbon atoms, and n is an integer of 0 or 1 to 5]is allowed to react with ammonia in a solvent in the presence of a copper-chromium catalyst and hydrogen, whereby 1-phenoxy-2-aminopropane of the formula ##STR2## [wherein R and n are as defined above] can be obtained at high yields at high selectivity.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: May 30, 1995
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Hidetoshi Koga, Izumi Terada
  • Patent number: 5286905
    Abstract: The present invention relates to a process for the production of a biguanide derivative useful as an intermediate for triazine-type herbicides, in which the biguanide derivative can be produced at high yields by reacting a phenoxyalkylamine salt with dicyandiamide in a solvent containing a paraffinic hydrocarbon having 8 to 15 carbon atoms, or by reacting a free phenoxylakylamine with a hydrogen halide in a solvent containing a paraffinic hydrocarbon having 8 to 15 carbon atoms and reacting the resultant a phenoxyalkylamine salt with dicyandiamide in the same solvent without isolating the phenoxyalkylamine salt.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: February 15, 1994
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Kazufumi Nakamura, Masahiro Nishii, Ryoichi Adachi, Masatoshi Uemura, Ichiro Nasuno, Izumi Terada, Takashi Mitsuyama, Hidetoshi Koga
  • Patent number: 5250686
    Abstract: A process for producing a triazine derivative of the formula (III), ##STR1## wherein R.sup.1 is a C.sub.1 -C.sub.4 alkyl group, n is an integer of O to 2, R.sup.2 is hydrogen or a C.sub.1 -C.sub.2 alkyl group, and X is a halogen atom,which comprises reacting a biguanide derivative of the formula, ##STR2## wherein R.sup.1 and n are as defined in the formula (III), and X' is a halogen atom,with a halocarboxylic acid ester of the formula, ##STR3## wherein R.sup.2 and X are as defined in the formula (III), and R.sup.3 is a C.sub.1 -C.sub.4 alkyl group,in the presence of a base, wherein a dehydrating agent is present in the reaction system, and processes for producing 2-fluoroisobutyric acid ester as an intermediate compound for the production of the triazine derivative.
    Type: Grant
    Filed: April 14, 1992
    Date of Patent: October 5, 1993
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Ryoichi Adachi, Kazufumi Nakamura, Masahiro Nishii, Masahiro Yoshida, Izumi Terada, Hidetoshi Koga