Patent US4618555A successfully refreshed from Google Patents.
US4618555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photoreceptor comprising azo compounds
Assignee: Mitsubishi Chemical Corp
•
Filing: 1984-12-27
•
Granted: 1986-10-21
•
Expires: 2004-12-27
Abstract
Abstract An electrophotographic photoreceptor according to this invention has a photosensitive layer in which a photoconductive substance with the following general formula (I): <IMAGE> (I) wherein X is selected from the group consisting of hydrogen atom, lower alkyl group, lower alkoxy group, halogen atom and cyano group; Y is phenylene or naphthylene group; Z1 and Z2 are independently the divalent group represented by the following formula: <IMAGE> wherein A is a divalent group derived from the aromatic hydrocarbon or heterocyclic compound including one or more nitrogen atoms in the ring; and n is 1 or 2, is incorporated.
Inventors
- 👤 Tetsumi Suzuki
- 👤 Tetsuo Murayama
- 👤 Hitoshi Ono
- 👤 Shinji Aramaki
- 👤 Michiyo Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:44
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0687; G03G5/0688; C; C09; C09B; C09B35/00; C09B35/35; C09B35/36; G03G5/0694; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
96 words
An electrophotographic photoreceptor having a photosensitive layer in which a photoconductive substance of azo compound having the general formula (I): ##STR61## wherein X is selected from the group consisting of hydrogen atom, lower alkyl group, lower alkoxy group, halogen atom and cyano group; Y is phenylene or naphthylene group; Z 1 and Z 2 are independently the divalent group represented by the following formula: ##STR62## wherein A is a divalent group derived from the aromatic hydrocarbon or heterocyclic compound including one or more nitrogen atoms in the ring; and n is 1 or 2, is incorporated.
Claim 2
Dependent Claim
96 words
An electrophotographic photoreceptor having a photosensitive layer in which a photoconductive substance of azo compound having the general formula (I): ##STR61## wherein X is selected from the group consisting of hydrogen atom, lower alkyl group, lower alkoxy group, halogen atom and cyano group; Y is phenylene or naphthylene group; Z 1 and Z 2 are independently the divalent group represented by the following formula: ##STR62## wherein A is a divalent group derived from the aromatic hydrocarbon or heterocyclic compound including one or more nitrogen atoms in the ring; and n is 1 or 2, is incorporated.
Claim 3
Dependent Claim
15 words
The photoreceptor of claim 1, wherein the photosensitive layer is provided on a conductive base.
Claim 4
Dependent Claim
41 words
The photoreceptor of claim 1 or 2, wherein the azo compound of the general formula (I) is incorporated in a layer for generating charge carriers on which a layer for transporting charge carriers is provided to form a laminated photosensitive layer.
Claim 5
Dependent Claim
47 words
The photoreceptor of claim 3, wherein the layer for generating charge carriers is formed by coating on the conductive base a coating solution in which the azo compound of the general formula (I) is dissolved or dispersed in a suitable solvent with or without a binder polymer.
Claim 6
Dependent Claim
19 words
The photoreceptor of claim 4, wherein the solvent is amine, ether, ketone, aromatic hydrocarbon, alcohol, ester or chlorinated hydrocarbon.
Claim 7
Dependent Claim
32 words
The photoreceptor of claim 4, wherein the binder polymer is a homopolymer or copolymer of vinyl compound, polyester, polycarbonate, polysulfone, polyvinylbutyral, phenoxy resin, cellulose ester or ether, urethane resin or epoxy resin.
Claim 8
Dependent Claim
31 words
The photoreceptor of claim 4, wherein the binder polymer is used in an amount of 0.1 to 5 parts by weight based on 1 part by weight of the azo compound.
Claim 9
Dependent Claim
19 words
The photoreceptor of claim 3, wherein the layer for generating charge carriers has the thickness of a few microns.
Claim 10
Dependent Claim
24 words
The photoreceptor of claim 3, wherein the layer for transporting charge carriers contains a medium for transporting electrons and/or a medium for transporting holes.
Claim 11
Dependent Claim
15 words
The photoreceptor of claim 9, wherein the medium for transporting electrons comprises an electron-attracting compound.
Claim 12
Dependent Claim
15 words
The photoreceptor of claim 9, wherein the medium for transporting holes comprises an electron-donating compound.
Claim 13
Dependent Claim
20 words
The photoreceptor of claim 3, wherein the layer for transporting charge carrier has the thickness of 5 to 50 microns.
Claim 14
Dependent Claim
14 words
The photoreceptor of claim 1, wherein the photosensitive layer contains any sensitizer and/or plasticizer.
References Cited (Backward Citations)
US4396696A
Cited
US4507471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |