US3620742A
Expired / Lapsed
US
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Photoconductive element containing a dihydroquinoline polymer
Assignee: Agfa Gevaert NV
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Filing: 1969-01-24
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Granted: 1971-11-16
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Expires: 1989-01-24
Abstract
Abstract Electrophotographic materials wherein the photoconductive layer comprises a dihydroquinoline polymer.
Inventors
- 👤 Jozef Frans Willems
- 👤 Robert Joseph Noe
- 👤 Johannes Josephus Vanheertum
- 👤 August Jean Van Paesschen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:32
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/026; G03G5/04; G03G5/06; G03G5/07; G03G5/075; G03G5/076; G03G5/0763
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
46 words
A recording material according to claim 1, wherein R represents hydrogen or a saturated or unsaturated, aliphatic or cycloaliphatic group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, a thiocarbamoyl group, and Z represents the necessary atoms to close a nucleus of the benzene series.
Claim 2
Dependent Claim
26 words
A recording material according to cLaim 1, wherein said conductive support has a resistivity at least 102 as low as that of the recording element itself.
Claim 3
Dependent Claim
14 words
A recording material according to claim 3, wherein the support is a paper support.
Claim 4
Dependent Claim
22 words
A recording material according to claim 3, wherein the support is an insulating transparent resin film coated with a transparent electroconductive interlayer.
Claim 5
Dependent Claim
14 words
A recording material according to claim 5, wherein said interlayer contains a polyionic resin.
Claim 6
Dependent Claim
21 words
A recording material according to claim 1, wherein the recording element is a recording layer containing particles decreasing the fringe effect.
Claim 7
Dependent Claim
43 words
A recording material according to claim 7, wherein the said particles have a grain size of 1 to 5 micron and are present in the recording layer in an amount of 2.4 to 24 percent by weight in respect of the polymeric material.
Claim 8
Dependent Claim
23 words
A recording material according to claim 1, wherein the photoconductive polymer is used in admixture with a polymeric binding agent and/or curing agent.
Claim 9
Dependent Claim
25 words
A recording material according to claim 1, wherein the polymeric substance is used in admixture with a substance increasing the photosensitivity of the recording element.
Claim 10
Dependent Claim
20 words
A recording material according to claim 1, wherein the polymeric substance is used in admixture with a spectral sensitizing dye.
Claim 11
Dependent Claim
24 words
A recording material according to claim 1, wherein the polymeric substance is used in admixture with at least one inorganic or organic photoconductive substance.
Claim 12
Dependent Claim
41 words
A recording material according to claim 12, wherein the polymeric substance is used in admixture with a photoconductive compound selected from the group of photoconductive selenium, and the photoconductive oxides, sulfides, and selenides of zinc, cadmium, mercury, antimony, bismuth and lead.
Claim 13
Dependent Claim
27 words
A recording material according to the claim 13, wherein the photoconductive recording element has an optical density not higher than 0.30 for visible light or copying light.
Claim 14
Dependent Claim
24 words
A recording material according to claim 1, wherein the recording element is spectrally sensitized by means of a xanthene dye and/or a methine dye.
Claim 15
Dependent Claim
30 words
A recording material according to claim 1, wherein the polymeric substance is used in admixture with a binding agent and/or a curing agent increasing the photoconductivity of the recording element.
Claim 16
Dependent Claim
21 words
A recording material according to claim 16, wherein the polymeric substance is used in admixture with the tetraglycidyl ether of tetraphenylene-ethane.
Claim 17
Dependent Claim
19 words
A recording material according to claim 1, wherein the polymeric substance is used in admixture with a diazonium compound.
Claim 18
Dependent Claim
14 words
A recording material according to claim 18, wherein the diazonium compound is p-nitrobenzene-diazonium chloride.
Claim 19
Dependent Claim
21 words
A recording material according to claim 1, wherein the polymeric substance comprises recurring units having one of the following structural formula:
Claim 20
Dependent Claim
29 words
A photographic reproduction process, which comprises the steps of (1) electrostatically charging a photoconductive insulating layer containing a photoconductive polymer comprising recurring groups corresponding to the following general formula:
Claim 21
Dependent Claim
19 words
The recording material of claim 1 wherein said polymeric substance contains up to about 10 of said recurring units.
Claim 22
Dependent Claim
19 words
The recording material of claim 22 wherein the polymer contains not more than about four of said recurring units.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |