US3840368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive layer with overcoat of dye sensitizer
Assignee: Panasonic Holdings Corp
•
Filing: 1971-10-01
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Granted: 1974-10-08
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Expires: 1991-10-01
Abstract
Abstract An electrophotographic element comprising a conductive support, an organic insulating layer attached to said conductive support, and a sensitizing organic layer contiguous to said organic insulating layer, said organic insulating layer having no sensitizers included therein and comprising a poly-Nalkenylcarbazole such as poly-N-vinylcarbazole or a nuclear substituted poly-N-vincylcarbazole, said sensitizing organic layer comprising an organic dye sensitizer. The electrophotographic element has high sensitivity to visible light.
Inventors
- 👤 M Ikeda
- 👤 H Sato
- 👤 Y Hasegawa
- 👤 E Torii
- 👤 K Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:38
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/043; G03G5/047
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
53 words
AN ELECTROPHOTOGRAPHIC ELEMENT COMPRISING IN THE FOLLOWING ORDER A CONDUCTIVE SUPPORT, AN ORGANIC INSULATING LAYER ON SAID CONDUCTIVE SUPPORT AND A SENSITIZING ORGANIC LAYER ON SAID ORGANIC INSULATING LAYER, SAID ORGANIC INSULATING LAYER HAVING NO SENSITIZERS INCLUDED THEREIN AND COMPRISING A POLYN-ALKENYLCARBAZOL, SAID SENSITIZIG ORGANIC LAYER CONSISTING ESSENTIALLY OF AN ORGANIC DYE SENSITIZER.
Claim 2
Dependent Claim
53 words
AN ELECTROPHOTOGRAPHIC ELEMENT COMPRISING IN THE FOLLOWING ORDER A CONDUCTIVE SUPPORT, AN ORGANIC INSULATING LAYER ON SAID CONDUCTIVE SUPPORT AND A SENSITIZING ORGANIC LAYER ON SAID ORGANIC INSULATING LAYER, SAID ORGANIC INSULATING LAYER HAVING NO SENSITIZERS INCLUDED THEREIN AND COMPRISING A POLYN-ALKENYLCARBAZOL, SAID SENSITIZIG ORGANIC LAYER CONSISTING ESSENTIALLY OF AN ORGANIC DYE SENSITIZER.
Claim 3
Dependent Claim
38 words
An electrophotographic element according to claim 1, wherein said sensitizing organic layer consists essentially of an organic sensitizer selected from the group consisting of pyrylium salts, thiapyrylium salts, carbonium salts, benzopyrylium salts, benzopyrylium salt derivatives, and mixtures thereof.
Claim 4
Dependent Claim
13 words
An electrophotographic element according to claim 1, wherein said poly-N-alkenylcarbazole is brominated poly-N-vinylcarbazole.
Claim 5
Dependent Claim
12 words
An electrophotographic element according to claim 1, wherein said poly-N-alkenylcarbazole is poly-N-vinylcarbazole.
Claim 6
Dependent Claim
38 words
An electrophotographic element according to claim 3, wherein said sensitizing organic layer consists essentially of an organic sensitizer selected from the group consisting of pyrylium salts, thiapyrylium salts, carbonium salts, benzopyrylium salts, benzopyrylium salt derivatives, and mixtures thereof.
Claim 7
Dependent Claim
29 words
An electrophotographic element according to claim 5, wherein said organic sensitizer is in an amount of 0.1 to 10 weight parts relative to 100 weight parts of said polymer.
Claim 8
Dependent Claim
20 words
An electrophotographic element according to claim 6, wherein said organic insulating layer has a thickness of 3 to 30 microns.
Claim 9
Dependent Claim
21 words
An electrophotographic element according to claim 7, wherein said sensitizing organic layer is in a thickness of 0.1 to 1 micron.
Claim 10
Dependent Claim
58 words
An electrophotographic element according to claim 8, wherein said sensitizing organic layer is formed by overcoating of a solution comprising said organic sensitizer combined with an organic matrix having a high electrical resistivity and a solvent onto said organic insulating layer, said solvent comprising a member selected from the group consisting of methanol, ethanol, acetone, methyl-ethylketone and butylacetate.
Claim 11
Dependent Claim
13 words
An electrophotographic element according to claim 9, wherein said organic matrix is polystyrene.
Claim 12
Dependent Claim
13 words
An electrophotographic element according to claim 9 wherein said organic matrix is polycarbonate.
Claim 13
Dependent Claim
20 words
An electrophotographic element according to claim 9, wherein said organic sensitizer is the reaction product of 2-(p-methoxystyryl)-3-phenylbenzopyrylium perchlorate and 2-(p-methoxystyryl)-3-phenyl-4-methoxypyrane.
Claim 14
Dependent Claim
16 words
An electrophotographic element according to claim 9, wherein said organic sensitizer is 2-((2''- Alpha -phenyl-p-methoxystyryl-4''-benzopyranylidene)methyl)-3-phenylbenzopyrylium perchlorate.
Claim 15
Dependent Claim
14 words
An electrophotographic element according to claim 9, wherein said organic sensitizer is 2-(p-methoxystyryl)-3-phenylbenzopyrylium perchlorate.
Claim 16
Dependent Claim
38 words
An electrophotographic element according to claim 4, wherein said sensitizing organic layer consisTs essentially of an organic sensitizer selected from the group consisting of pyrylium salts, thiapyrylium salts, carbonium salts, benzopyrylium salts, benzopyrylium salt derivatives, and mixtures thereof.
Claim 17
Dependent Claim
29 words
An electrophotographic element according to claim 15, wherein said organic sensitizer is in an amount of 0.1 to 10 weight parts relative to 100 weight parts of said polymer.
Claim 18
Dependent Claim
20 words
An electrophotographic element according to claim 16, wherein said organic insulating layer has a thickness of 3 to 30 microns.
Claim 19
Dependent Claim
21 words
An electrophotographic element according to claim 17, wherein said sensitizing organic layer is in a thickness of 0.1 to 1 micron.
Claim 20
Dependent Claim
58 words
An electrophotographic element according to claim 18, wherein said sensitizing organic layer is formed by overcoating of a solution comprising said organic sensitizer combined with an organic matrix having a high electrical resistivity and a solvent onto said organic insulating layer, said solvent comprising a member selected from the group consisting of methanol, ethanol, acetone, methyl-ethylketone and butylacetate.
Claim 21
Dependent Claim
13 words
An electrophotographic element according to claim 19, wherein said organic matrix is polystyrene.
Claim 22
Dependent Claim
13 words
An electrophotographic element according to claim 19, wherein said organic matrix is polycarbonate.
Claim 23
Dependent Claim
20 words
An electrophotographic element according to claim 19, wherein said organic sensitizer is the reaction product of 2-(p-methoxystyryl)-3-phenylbenzopyrylium perchlorate and 2-(p-methoxystyryl)-3-phenyl-4-methoxypyrane.
Claim 24
Dependent Claim
16 words
An electrophotographic element according to claim 19, wherein said organic sensitizer is 2-((2''- Alpha -phenyl-p-methoxystyryl-4''-benzopyranylidene)methyl)-3-phenylbenzopyrylium perchlorate.
Claim 25
Dependent Claim
14 words
An electrophotographic element according to claim 19, wherein said organic sensitizer is 2-(p-methoxystyryl)-3-phenylbenzopyrylium perchlorate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |