Patents by Inventor Chieko Inayoshi

Chieko Inayoshi 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: 6790574
    Abstract: An electrophotographic photoreceptor having a photosensitive layer containing, as a charge transporting material, at least one indane compound of the formula (1), and at least one polycarbonate resin of the formula (4) and/or an organic additive containing at least one atom selected from the group consisting of nitrogen, oxygen, phosphorus and sulfur for an electrophotographic photoreceptor.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: September 14, 2004
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Katsumi Abe, Chieko Inayoshi, Masaki Ohkubo, Mitsutoshi Anzai, Yasuo Murakami
  • Publication number: 20030203298
    Abstract: An electrophotographic photoreceptor having a photosensitive layer containing, as a charge transporting material, at least one indane compound of the formula (1), 1
    Type: Application
    Filed: September 26, 2002
    Publication date: October 30, 2003
    Applicant: Hodogaya Chemical Co., Ltd.
    Inventors: Katsumi Abe, Chieko Inayoshi, Masaki Ohkubo, Mitsutoshi Anzai, Yasuo Murakami
  • Patent number: 5840980
    Abstract: A diamine compound of the following formula (1): ##STR1## wherein R.sub.1 is a hydrogen atom, a lower alkyl group or a lower alkoxy group, each of A.sub.1, A.sub.2 and A.sub.3 which are independent of one another, is a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a group of the following formula (2): ##STR2## wherein R.sub.1 is as defined above, and X is a substituted or unsubstituted arylene group or a substituted or unsubstituted heterocyclic bivalent group.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: November 24, 1998
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Mitsutoshi Anzai, Atsushi Takesue, Takanobu Watanabe, Chieko Inayoshi
  • Patent number: 5728500
    Abstract: An acenaphthene compound of the following formula (1), ##STR1## wherein Ar.sub.1 is an aryl group which may have a substituent; Ar.sub.2 is a phenylene, naphthylene, biphenylene or anthrylene group which may have a substituent; R.sub.1 is a hydrogen atom, a lower alkyl group or a lower alkoxy group; X is a hydrogen atom, an alkyl group which may have a substituent or an aryl group which may have a substituent; and Y is an aryl group which may have a substituent or a group of the formula (2), ##STR2## wherein R.sub.2 is a hydrogen atom, a lower alkyl group or a lower alkoxy group, R.sub.3 is a hydrogen atom, a halogen atom or a lower alkyl group, Z is a hydrogen atom or an aryl group which may have a substituent, and m and n are an integer of from 0 to 4.
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: March 17, 1998
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Atsushi Takesue, Mitsutoshi Anzai, Takanobu Watanabe, Chieko Inayoshi
  • Patent number: 5721082
    Abstract: There are provided an electrophotographic photoreceptor having a photosensitive layer containing at least one amine compound represented by formula (1): ##STR1## wherein Ar.sub.1 represents a substituted or unsubstituted aryl group; Ar.sub.2 represents a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted biphenylene group or a substituted or unsubstituted anthrylene group; R.sub.1 represents a hydrogen atom, a lower alkyl group or a lower alkoxy group; X represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; and Y represents a substituted or unsubstituted aryl group, or a group represented by formula (2) or (3) described in the specification.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: February 24, 1998
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Atsushi Takesue, Mitsutoshi Anzai, Takanobu Watanabe, Chieko Inayoshi
  • Patent number: 5707768
    Abstract: A diamine compound of the following formula (1): ##STR1## wherein R.sub.1 is a hydrogen atom, a lower alkyl group or a lower alkoxy group, each of A.sub.1, A.sub.2 and A.sub.3 which are independent of one another, is a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a group of the following formula (2): ##STR2## wherein R.sub.1 is as defined above, and X is a substituted or unsubstituted arylene group or a substituted or unsubstituted heterocyclic bivalent group.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: January 13, 1998
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Mitsutoshi Anzai, Atsushi Takesue, Takanobu Watanabe, Chieko Inayoshi
  • Patent number: 5654481
    Abstract: There is provided an amine compound represented by formula (1): ##STR1## wherein Ar.sub.1 represents a substituted or unsubstituted aryl group; Ar.sub.2 represents a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted biphenylene group or a substituted or unsubstituted anthrylene group; R.sub.1 represents a hydrogen atom, a lower alkyl group or a lower alkoxy group; X represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; and Y represents a substituted or unsubstituted aryl group, or a group represented by formula (2) or (3) described in the specification.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: August 5, 1997
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Mitsutoshi Anzai, Atsushi Takesue, Takanobu Watanabe, Chieko Inayoshi