US4783387A
Expired / Lapsed
US
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Photosensitive member comprising disazo pigment
Assignee: Minolta Co Ltd
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Filing: 1987-10-07
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Granted: 1988-11-08
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Expires: 2007-10-07
Abstract
Abstract The present invention provides a new photosensitive member, in which a specific disazo pigment is used as a photoconductive material, which is excellent in whole static properties, especially in sensitivity.
Inventors
- 👤 Hideaki Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:24
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0679; G03G5/0681; C; C09; C09B; C09B35/00; C09B35/02; C09B35/021; C09B35/023
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
A photosensitive member having a photosensitive layer on an electroconductive substrate, said photosensitive layer containing a disazo pigment which is expressed by the following general formula (I) ##STR27## wherein: A represents an aromatic hydrocarbon group or heterocyclic group, which can be formed in a bond by means of a bonding group; Z represents a residual group which forms a polycyclic bond group/heterocyclic group by condensation with a benzene ring and which can have a substitution group; R 1 represents an alkyl group, aryl group or heterocyclic group, each of which can have a substitution group; and X represents a nitrogen atom which can have oxygen, sulfur, and/or a substitution group.
Claim 2
Dependent Claim
110 words
A photosensitive member having a photosensitive layer on an electroconductive substrate, said photosensitive layer containing a disazo pigment which is expressed by the following general formula (I) ##STR27## wherein: A represents an aromatic hydrocarbon group or heterocyclic group, which can be formed in a bond by means of a bonding group; Z represents a residual group which forms a polycyclic bond group/heterocyclic group by condensation with a benzene ring and which can have a substitution group; R 1 represents an alkyl group, aryl group or heterocyclic group, each of which can have a substitution group; and X represents a nitrogen atom which can have oxygen, sulfur, and/or a substitution group.
Claim 3
Dependent Claim
32 words
A photosensitive member of claim 1, in which the A is selected from the group consisting of benzene ring, diphenyl ring, anthraquinone ring, fluorenone ring, oxazol ring, carbazole ring, and oxadiazole ring.
Claim 4
Dependent Claim
30 words
A photosensitive member of claim 1, in which the R 1 is selected from the group consisting of phenyl, alkyl and/or alkoxy substituted-phenyl, chlorophenyl, nitrophenyl, biphenyl, naphthyl group, and 9-oxyfluorenyl.
Claim 5
Dependent Claim
23 words
A photosensitive member of claim 1, in which the group Z is selected from the group consisting of naphthyl, anthranyl, dibenzofuranyl, and dibenzocarbazolyl.
Claim 6
Dependent Claim
27 words
A photosensitive member of claim 1, in which the X is selected from the group consisting of O, S, N, alkyl substituted nitrogen, and phenyl substituted nitrogen.
Claim 7
Dependent Claim
21 words
A photosensitive member of claim 1, in which the thickness of the photosensitive layer is from 3 to 30 micron meter.
Claim 8
Dependent Claim
37 words
A photosensitive member of claim 1, in which the content of the disazo pigment is from 0.01 to 2 parts by weight based on one part by weight of a binder resin used for the photosensitive layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |