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US4278747A
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Electrophotographic plate comprising a conductive substrate and a photosensitive layer containing an organic photoconductor layer composed of a hydrazone compound
Assignee: Mitsubishi Chemical Corp
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Filing: 1979-04-26
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Granted: 1981-07-14
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Expires: 1999-04-26
Abstract
Abstract An electrophotographic plate comprising a conductive substrate and a photosensitive layer containing an organic photoconductor layer composed of a hydrazone compound represented by the general formula (I): <IMAGE> (I) (wherein R1 and R2 are an alkyl, aralkyl or aryl group which may or may not have a substituent, n is a number of 1 or 2, and A is an aromatic hydrocarbyl group or aromatic heterocyclic group which may or may not have a substituent) and a binder.
Inventors
- 👤 Tetsuo Murayama
- 👤 Shigenori Otsuka
- 👤 Tsunemitsu Tajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:23
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0616; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0629
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
87 words
An electrophotographic plate comprising a conductive substrate and a photosensitive layer coated thereon; wherein said photosensitive layer comprises an organic photoconductor layer; and wherein said organic photoconductor layer comprises a hydrazone compound represented by the general formula (I): ##STR15## wherein R 1 and R 2 are independently selected from the group consisting of substituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, and substituted or unsubstituted aryl, n is a number of 1 or 2, and A is an unsubstituted or substituted aromatic heterocyclic group, and a binder.
Claim 2
Dependent Claim
87 words
An electrophotographic plate comprising a conductive substrate and a photosensitive layer coated thereon; wherein said photosensitive layer comprises an organic photoconductor layer; and wherein said organic photoconductor layer comprises a hydrazone compound represented by the general formula (I): ##STR15## wherein R 1 and R 2 are independently selected from the group consisting of substituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, and substituted or unsubstituted aryl, n is a number of 1 or 2, and A is an unsubstituted or substituted aromatic heterocyclic group, and a binder.
Claim 3
Dependent Claim
26 words
The electrophotographic plate, according to claim 1, wherein at least one of R 1 and R 2 in the general formula (I) is an aryl group.
Claim 4
Dependent Claim
17 words
The electrophotographic plate, according to claim 1, wherein A in the general formula (I) is N-ethylcarbazolyl group.
Claim 5
Dependent Claim
19 words
The electrophotographic plate, according to any of claims 1 to 3, wherein the organic photoconductor layer contains a dye.
Claim 6
Dependent Claim
30 words
The electrophotographic plate, according to any of claims 1 to 3, wherein the organic photoconductor layer contains an electron acceptor which forms a charge transfer complex with said hydrazone compound.
Claim 7
Dependent Claim
55 words
The electrophotographic plate, according to any of claims 1 to 3, wherein the organic photoconductor layer contains a photoconductive material with high charge generating efficiency selected from the group consisting of selenium, selenium alloys, cadmium sulfide, phthalocyanine pigments, perinone pigments, thioindigo pigments, quinacridone pigments, perylene pigments, anthraquinone pigments, azo pigments, bisazo pigments and cyanine pigments.
Claim 8
Dependent Claim
74 words
The electrophotographic plate, according to any of claims 1 to 3, wherein said photosensitive layer comprises a double-layer composed of said organic photoconductor layer functioning as a charge transporting layer and a charge generating layer containing a photoconductive material with high charge generating efficiency selected from the group consisting of selenium, selenium alloys, cadmium sulfide, phthalocyanine pigments, perinone pigments, thioindigo pigments, quinacridone pigments, perylene pigments, anthraquinone pigments, azo pigments, bisazo pigments and cyanine pigments.
Claim 9
Dependent Claim
29 words
The electrophotographic plate, according to claim 7, wherein the charge generating layer is formed from an aggregate of the particles of said photoconductive material with high charge generating efficiency.
Claim 10
Dependent Claim
30 words
The electrophotographic plate, according to claim 7, wherein the charge generating layer is a dispersion of the particles of said photoconductive material with high charge generating efficiency in a binder.
Claim 11
Dependent Claim
43 words
The electrophotographic plate, according to claim 8, wherein said photoconductive material with high charge generating efficiency is at least one material selected from the group consisting of selenium, selenium alloys, cadmium sulfide, phthalocyanine pigment, perinone pigment, perylene pigment, bisazo pigment and cyanine pigment.
Claim 12
Dependent Claim
20 words
The electrophotographic plate, according to claim 9, wherein said photoconductive material with high charge generating efficiency is a bisazo pigment.
Claim 13
Dependent Claim
26 words
The electrophotographic plate, according to claim 7, wherein said charge generating layer is a vacuum evaporation layer of said photoconductive material with high charge generating efficiency.
Claim 14
Dependent Claim
33 words
The electrophotographic plate, according to claim 12, wherein said photoconductive material with high charge generating efficiency is at least one of the group consisting of selenium, selenium alloys, phthalocyanine pigment and perylene pigment.
Claim 15
Dependent Claim
38 words
The electrophotographic plate, according to claim 9, wherein said photoconductive material is at least one material selected from the group consisting of selenium, selenium alloys, cadmium sulfide, phthalocyanine pigment, perinone pigment, perylene pigment, bisazo pigment and cyanine pigment.
Claim 16
Dependent Claim
15 words
The electrophotographic plate, according to claim 8, wherein said photoconductive material is a bisazo pigment.
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) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |