Patents by Inventor Tsuneaki Hirashima

Tsuneaki Hirashima 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: 4945021
    Abstract: The present invention relates to a photosensitive member containing a specific bisazo compound described by general structural formula[I] and formed on an electrically conductive substrate; ##STR1## Wherein X is a hydrogen atom, halogen atom, alkyl radical, alkoxi radical, nitro radical or cyano radical; A is a diatomic radical selected from among the following: ##STR2## B is a coupler described by formulae [II] through [VI]; ##STR3## R is a hydrogen atom, halogen atom, alkyl radical, alkoxi radical, nitro radical or cyano radical; and Y is an aromatic carbocyclic residue or aromatic heterocyclic residue, each of which may have a substituent; G is a carbamoyl radical or sulfamoyl radical and may have a substituent; R.sub.1 is a hydrogen atom, alkyl radical, amino radical or carbamoyl radical, each of which may have a substituent, a carboxyl radical or cyano radical; M is an aryl group which may have a substituent, which is improved in photosensitivity and dispersibility.
    Type: Grant
    Filed: February 10, 1989
    Date of Patent: July 31, 1990
    Assignees: Minolta Camera Kabushiki Kaisha, Osaka Municipal Government
    Inventors: Masakazu Takata, Takamasa Ueda, Kimiyuki Ito, Yuko Mikasa, Yuki Shimada, Tsuneaki Hirashima, Souichi Yamamoto, Yoshio Ishino, Toshinobu Ohno
  • Patent number: 4871633
    Abstract: The present invention uses an azo pigment having in the center of an N-oxide heterocyclic structure as a photoelectrical charge-generating material. The pigments are excellent in dispersion stability in a dispersed solution, and enable the provision of a photosensitive member excellent in sensitivity properties.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: October 3, 1989
    Assignees: Minolta Camera Kabushiki Kaisha, Osaka Municipal Government
    Inventors: Masakazu Takata, Takamasa Ueda, Kimiyuki Ito, Tsuneaki Hirashima, Souichi Yamamoto, Yoshio Ishino, Toshinobu Ohno
  • Patent number: 4510025
    Abstract: There is provided a novel method for producing 2,2-dimethyl-3-methylenebicyclo[2.2.1]heptan-5-ol and 2,2,3-trimethylbicyclo[2.2.1]heptan-3,5-diol and their lower fatty acid esters. Also provided are perfume, fragrance compositions containing 2,2-dimethyl-3-methylenebicyclo[2.2.1]heptan-5-ol or a lower fatty acid ester thereof, which has a fragrance characteristic of floral scent.
    Type: Grant
    Filed: August 24, 1983
    Date of Patent: April 9, 1985
    Assignee: Kuraray Company, Ltd.
    Inventors: Yoshiharu Matsubara, Tsuneaki Hirashima, Ikuzo Nishiguchi
  • Patent number: 4393216
    Abstract: A method of producing aminobenzimidazolones which comprises reacting a compound I having the general formula ##STR1## wherein X, Y and Z independently represent a substituent selected from the group consisting of a nitro group and an amino group, with carbon monoxide in solvent in the presence of selenium and an inorganic base or an organic base, and in the presence of water when the compound I has nitro groups, thereby providing a compound II having the general formula ##STR2##
    Type: Grant
    Filed: June 22, 1981
    Date of Patent: July 12, 1983
    Assignees: Showa Chemical Co., Ltd., Osaka Municipal Government
    Inventors: Tsuneaki Hirashima, Toshiyuki Miyata, Yoshikazu Yamamoto, Mitsuyuki Kato
  • Patent number: 4374250
    Abstract: A method of producing benzimidazolone which comprises reacting a feed compound having the general formula ##STR1## wherein X and Y independently represent an amino group or a nitro group, with carbon monoxide in solvent in the presence of selenium and a base, and in the presence of water when the feed compound has nitro groups.
    Type: Grant
    Filed: June 22, 1981
    Date of Patent: February 15, 1983
    Assignee: Osaka Municipal Government
    Inventors: Tsuneaki Hirashima, Toshiyuki Miyata