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US5219689A Expired / Lapsed US ⏱️ 0.0 years remaining

Electrophotographic photoreceptor comprising azo compound

Assignee: Mitsubishi Paper Mills Ltd
•
Filing: 1991-08-08
•
Granted: 1993-06-15
•
Expires: 2011-08-08
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Abstract

Abstract The invention provides an electrophotographic photoreceptor of high sensitivity and high endurance which comprises a conductive support and a light-sensitive layer which contains at least one bis-azo compound selected from the group consisting of those represented by the following formulas (I)-(II): <IMAGE> (I) <IMAGE> (II) wherein n represents 0, 1, or 3; R1 represents a halogen atom, a hydroxyl group, or an alkyl, aralkyl, aryl, hyterocyclic or alkoxy group which may have a substituent and when n is 2 or 3, R1 may be identical or different; R2 represents a hydrogen atom, a halogen atom, a cyano group, or an ester, alkyl, aralkyl or aryl group which may have a substituent; R3 represents an alkyl, aralkyl, aryl or heterocyclic group which may have a substituent; Ar represents an arylene which may have a substituent; and A1 and A2 each represents an aryl or heterocyclic group which has a hydroxyl group and may be identical or different.

Inventors

  • 👤 Akira Itoh
  • 👤 Hideki Nagamura

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 07:37
CPC Classifications
C; C09; C09B; C09B56/00; C09B35/00; C09B35/02; C09B35/039; C09B35/34; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0679; G03G5/0681

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 154 words
An electrophotographic photoreceptor which comprises a conductive support and a light-sensitive layer which contains at least one bis-azo compound selected from the group consisting of those represented by the following formulas (I)-(II): ##STR87## wherein n represents 0, 1, 2, or 3; R 1 represents a halogen atom, a hydroxyl group, or an alkyl, aralkyl, aryl, heterocyclic or alkoxy group which may have a substituent and when n is 2 or 3, R 1 may be identical or different; R 2 represents a hydrogen atom, a halogen atom, a cyano group, or an ester, alkyl, aralkyl or aryl group which may have a substituent; R 3 represents an alkyl, aralkyl, aryl or heterocyclic group which may have a substituent; Ar represents an arylene or heteroarylene group which may have a substituent; and A 1 and A 2 each represents an aryl or heterocyclic group which has a hydroxyl group and may be identical or different.
Claim 2
Dependent Claim 154 words
An electrophotographic photoreceptor which comprises a conductive support and a light-sensitive layer which contains at least one bis-azo compound selected from the group consisting of those represented by the following formulas (I)-(II): ##STR87## wherein n represents 0, 1, 2, or 3; R 1 represents a halogen atom, a hydroxyl group, or an alkyl, aralkyl, aryl, heterocyclic or alkoxy group which may have a substituent and when n is 2 or 3, R 1 may be identical or different; R 2 represents a hydrogen atom, a halogen atom, a cyano group, or an ester, alkyl, aralkyl or aryl group which may have a substituent; R 3 represents an alkyl, aralkyl, aryl or heterocyclic group which may have a substituent; Ar represents an arylene or heteroarylene group which may have a substituent; and A 1 and A 2 each represents an aryl or heterocyclic group which has a hydroxyl group and may be identical or different.
Claim 3
Dependent Claim 21 words
An electrophotographic photoreceptor according to claim 1, wherein the light-sensitive layer additionally contains a charge transport material and a binder resin.
Claim 4
Dependent Claim 38 words
An electrophotographic photoreceptor according to claim 1, wherein the light-sensitive layer comprises a charge generation layer comprising the bis-azo compound and a binder resin and a charge transport layer comprising a charge transport material and a binder resin.
Claim 5
Dependent Claim 31 words
An electrophotographic photoreceptor according to claim 1, wherein the conductive support is selected from a metallic drum, a metallic sheet, a conductive paper, and a sheet-like, drum-like or belt-like plastic film.

References Cited (Backward Citations)

US4471040A Cited
US4389475A Cited
US4413045A Cited
DE3804421A1 Cited
JPH01230057A Cited
JPH01257960A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1996-06-14 1996-12-14 1997-06-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2000-06-14 2000-12-14 2001-06-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2004-06-14 2004-12-14 2005-06-15 $7700.00 Window Closed / Lapsed

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