Patents by Inventor Keishi Imanishi

Keishi Imanishi 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).

  • Red luminous ink composition
    Patent number: 6846350
    Abstract: Disclosed is a red luminous ink composition comprising a europium complex represented by the formula: wherein R1 is a hydrogen atom or a substituent selected from the group consisting of an alkyl group having from 1 to 4 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms and a halogen atom, R is a group selected from the group consisting of a fluorine-comprising alkyl group having from 1 to 20 carbon atoms, a substituted or unsubstituted alkyl group having from 1 to 6 carbon atoms, a substituted or unsubstituted aralkyl group having from 7 to 10 carbon atoms and a substituted or unsubstituted aryl group having from 6 to 12 carbon atoms. The red luminous ink composition exhibits satisfactory emission intensity under ultraviolet irradiation.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: January 25, 2005
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Keishi Imanishi, Yasuhiro Yamasaki
  • Luminous organic compound and manufacturing method
    Publication number: 20050008896
    Abstract: A luminous organic compound is represented by following formula (1). The luminous organic compound has sufficient solubility into the ink, fastness, light-resistance, luminous efficacy or brightness, and excellent mechanical durability, chemical durability and luminescent ability.
    Type: Application
    Filed: June 30, 2004
    Publication date: January 13, 2005
    Applicant: Orient Chemical Ind., Ltd.
    Inventors: Keishi Imanishi, Yasuhiro Yamasaki
  • Blue luminous ink composition
    Patent number: 6743283
    Abstract: Disclosed is a blue luminous ink composition comprising a luminous compound represented by the formula: wherein R1 is a group selected from the group consisting of a hydrogen atom, an alkyl group having from 1 to 4 carbon atoms, an alkoxyl group having from 1 to 4 carbon atoms and a halogen atom, R is a group selected from the group consisting of a fluorine-comprising alkyl group having from 1 to 20 carbon atoms, a substituted or unsubstituted alkyl group having from 1 to 4 carbon atoms, a substituted or unsubstituted aralkyl group having from 7 to 10 carbon atoms and a substituted or unsubstituted aryl group having from 6 to 12 carbon atoms, M is a two-valent or three-valent metal, provided rare-earth metal and alkaline earth metal (IIa group) are eliminated, and n is an integer of 2 or 3. The blue luminous ink composition exhibits satisfactory emission intensity under ultraviolet irradiation.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: June 1, 2004
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Keishi Imanishi, Yasuhiro Yamasaki
  • Blue luminous ink composition
    Publication number: 20030110979
    Abstract: Disclosed is a blue luminous ink composition comprising a luminous compound represented by the formula: 1
    Type: Application
    Filed: August 30, 2002
    Publication date: June 19, 2003
    Inventors: Keishi Imanishi, Yasuhiro Yamasaki
  • Red luminous ink composition
    Publication number: 20030106460
    Abstract: Disclosed is a red luminous ink composition comprising a europium complex represented by the formula: 1
    Type: Application
    Filed: July 16, 2002
    Publication date: June 12, 2003
    Inventors: Keishi Imanishi, Yasuhiro Yamasaki