Patent US3385481A successfully refreshed from Google Patents.
Patent US3798031A successfully refreshed from Google Patents.
US3798031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive 1,2,3,4-tetrahydroquinolines employed in electrophotography
Assignee: Agfa Gevaert NV
•
Filing: 1972-11-09
•
Granted: 1974-03-19
•
Expires: 1992-11-09
Abstract
Abstract Electrophotographical recording process wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording layer containing as essential photoconductive compound a photoconductive 1,2,3,4tetrahydroquinoline. The photoconductive compound can be chemically and spectrally sensitized and charged either negatively or positively.
Inventors
- 👤 R Pollet
- 👤 H Sneyers
- 👤 W Janssens
- 👤 J Vanheertum
- 👤 J Dierckx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:06
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0635; G03G5/0637; C; C07; C07D; C07D215/00; C07D215/02; C07D215/04; C07D215/06; C07D215/16; C07D215/20; C07D221/00; C07D221/02; C07D221/04; C07D221/18; C07D455/00; C07D455/03; C07D455/04; G03G5/0644; G03G5/0646; G03G5/0661
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
16 words
A recording process according to claim 1, wherein R1 represents an alkyl radical introduced by alkylation.
Claim 2
Dependent Claim
19 words
A recording process according to claim 1, wherein Z1 represents the necessary atoms to close an adjacent benzene nucleus.
Claim 3
Dependent Claim
14 words
A recording process according to claim 1, wherein each R2 represents a methyl group.
Claim 4
Dependent Claim
15 words
A recording to claim 1, wherein the photoconductive compound corresponds to the following general formula:
Claim 5
Independent Claim
38 words
A method for recording and reproducing information comprising the steps of producing an electrostatic charge pattern by electrostatically charging and information-wise exposing to electromagnetic radiation a recording element containing a photoconductive comPound corresponding to the following general formula:
Claim 6
Dependent Claim
36 words
A process according to claim 1, wherein the recording element is a recording layer that has been applied to an electro conductive layer or support having a resistivity lower than that of the dark-adapted recording element.
Claim 7
Dependent Claim
30 words
A process according to claim 7, wherein the electro conductive layer or support has a resistivity at least 102 as low as that of the recording element in the dark.
Claim 8
Dependent Claim
13 words
A process according to claim 7, wherein the support is a paper support.
Claim 9
Dependent Claim
21 words
A process according to claim 7, wherein the support is an insulating transparent resin support coated with a transparent electroconductive interlayer.
Claim 10
Dependent Claim
13 words
A process according to claim 10, wherein said interlayer contains a polyionic resin.
Claim 11
Dependent Claim
19 words
A process according to claim 1, wherein the photoconductive compound is used in admixture with a polymeric binding agent.
Claim 12
Dependent Claim
24 words
A process according to claim 1, wherein the photoconductive compound is used in admixture with a halogen-containing polymer, an epoxy resin and/or silicone resin.
Claim 13
Dependent Claim
14 words
A process according to claim 13, wherein the halogen-containing polymer contains vinyl chloride units.
Claim 14
Dependent Claim
24 words
A process according to claim 1, wherein the photoconductive compound is used in admixture with a substance increasing the photosensitivity of the recording element.
Claim 15
Dependent Claim
19 words
A process according to claim 1, wherein the photoconductive compound is used in admixture with a spectral sensitizing dye.
Claim 16
Dependent Claim
24 words
A process according to claim 1, wherein the defined organic photoconductive compound is used in admixture with (an) other inorganic and/or organic photoconductive substance(s).
Claim 17
Dependent Claim
85 words
A recording material containing a photoconductive insulating recording element capable of being electrostatically charged in the absence of active electromagnetic radiation and capable of retaining the applied charge for a period of time long enough to produce thereon a developed electrostatic charge pattern, characterized in that the recording element stands in electroconductive relationship to a layer or support with a lower resistivity than that of the recording element and in that the recording element contains an organic photoconductive compound corresponding to the following general formula:
Claim 18
Dependent Claim
16 words
A recording material according to claim 18, wherein R1 represents an alkyl radical introduced by alkylation.
Claim 19
Dependent Claim
19 words
A recording material according to claim 18, wherein Z1 represents the necessary atoms to close an adjacent benzene nucleus.
Claim 20
Dependent Claim
13 words
A recording material according to claim 18, each R2 represents a methyl group.
Claim 21
Dependent Claim
17 words
A recording material according to claim 18, wherein the photoconductive compound corresponds to the following general formula:
Claim 22
Dependent Claim
48 words
A recording material according to claim 22, wherein Z1 represents the necessary atoms to cloSe an adjacent benzene nucleus or adjacent benzene nucleus substituted with methyl or alkoxy, and A represents an alkylene group, a substituted alkylene group or an alkylene chain interrupted by a bivalent aromatic group.
Claim 23
Dependent Claim
13 words
A recording material according to claim 18, each R2 represents a methyl group.
Claim 24
Dependent Claim
17 words
A recording material according to claim 18, wherein the recording element is a supported or self-supported layer.
Claim 25
Dependent Claim
26 words
A recording material according to claim 18, wherein the recording element contains said organic photoconductive compound in an amount of at least 5 percent by weight.
Claim 26
Dependent Claim
47 words
A recording material according to claim 18, wherein the recording element is in layer or sheet form and stands in electroconductive contact with a layer or support that has a resistivity being at least 102 times as low as that of the recording element in the dark.
Claim 27
Dependent Claim
14 words
A recording material according to claim 18, wherein the support is a paper support.
Claim 28
Dependent Claim
22 words
A recording material according to claim 18, wherein the support is an insulating transparent resin support coated with a transparent electroconductive interlayer.
Claim 29
Dependent Claim
14 words
A recording material according to claim 29, wherein said interlayer contains a polyionic resin.
Claim 30
Dependent Claim
21 words
A recording material according to claim 18, wherein the organic photoconductive compound is used in admixture with a polymeric binding agent.
Claim 31
Dependent Claim
24 words
A recording material according to claim 31, wherein the photoconductive compound is used in admixture with a halogen-containing polymer, epoxy resin and/or silicone resin.
Claim 32
Dependent Claim
21 words
A recording material according to claim 18, wherein the organic photoconductive compound is used in admixture with a spectral sensitizing dye.
Claim 33
Dependent Claim
25 words
A recording material according to claim 18, wherein the organic photoconductive compound is used in admixture with (an) other inorganic and/or other organic photoconductive substance(s).
Claim 34
Dependent Claim
42 words
A recording material according to claim 34, wherein the organic photoconductive compound is used in admixture with a photoconductive compound selected from the group of photoconductive selenium and the photoconductive oxides, sulphides and selenides of zinc, cadmium, mercury, antimony, bismuth and lead.
Claim 35
Dependent Claim
26 words
A recording material according to claim 18, wherein the photoconductive recording element has an optical density not higher than 0.30 for visible light or copying light.
Claim 36
Dependent Claim
22 words
A recording material according to claim 33, wherein the recording element contains a spectrally sensitizing triarylmethane dye, xanthene dye and/or methine dye.
Claim 37
Dependent Claim
26 words
A recording material according to claim 18, wherein the recording element contains as chemical sensitizing agent a compound having (a) substituent(s) with srong electron-attracting (electro-negative) character.
Claim 38
Dependent Claim
18 words
A recording material according to claim 38, wherein the chemical sensitizing agent is a non-ionic Lewis acid compound.
Claim 39
Dependent Claim
22 words
A recording material according to claim 39, wherein the chemical sensitizing agent is a quinone, which is substituted with halogen or cyano.
References Cited (Backward Citations)
US888016A
Cited
US3155503A
Cited
US3307940A
Cited
US3232755A
Cited
GB1245924A
Cited
FR1588977A
Cited
US3560209A
Cited
US3620742A
Cited
US3660084A
Cited
US3684505A
Cited
US3730711A
Cited
US3707369A
Cited
US3686153A
Cited
US3647428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |