Patent US3660084A successfully refreshed from Google Patents.
US3660084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording process using quinolin-2-one or quinolin-4-one organic photoconductive substances
Assignee: Agfa Gevaert NV
•
Filing: 1970-03-24
•
Granted: 1972-05-02
•
Expires: 1990-03-24
Abstract
Abstract Electrophotographic recording process wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording layer using as the essential photoconductive compound guinolin-2-one, quinolin-4-one, certain analogs and structural derivatives thereof, as well as the bis forms thereof, dispersed in an insulating binder. At least about 10 percent by weight of the recording element is constituted by the photoconductive compound and a spectral sensitizing agent for the photoconductor can be included. This class of photoconductors is also useful in the production of phosphor patterns on cathoderay tube screens.
Inventors
- 👤 Johannes Joseph Vanheertum
- 👤 Albert Lucien Poot
- 👤 Jozef Frans Willems
- 👤 Wilhelmus Janssens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:12
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/20; C07D215/22; C07D215/227; C07D215/12; C07D215/18; C07D215/233; C07D215/36; C07D215/38; C07D215/42; C07D215/48; C07D215/54; C07D215/56; C09; C09B; C09B23/00; C09B23/0075; C09B23/02; C09B23/04; C09B23/06; C09B26/00; C09B26/02; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0528; G03G5/0532; G03G5/0546; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0635; G03G5/0637; G03G5/0644; G03G5/0661; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067; G03G5/07; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/22; H01J29/225
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
34 words
A recording process according to claim 1, wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording element comprising a photoconductive quinoline compound carrying an oxygen atom in the two-position.
Claim 2
Dependent Claim
21 words
exposing the recording layer to activating electromagnetic radiation creating an electrostatic charge pattern corresponding with the phosphor pattern to be formed,
Claim 3
Dependent Claim
11 words
developing the electrostatic charge pattern by means of phosphor particles, and
Claim 4
Dependent Claim
34 words
A recording process according to claim 1, wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording element comprising a photoconductive quinoline compound carrying a sulphur atom in the two-position.
Claim 5
Dependent Claim
33 words
A recording process, according to claim 1, wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording element comprising a photoconductive quinoline compound carrying a group in the two-position.
Claim 6
Dependent Claim
13 words
removing the photoconductive compound and optionally present binding agent by heating the support.
Claim 7
Dependent Claim
39 words
A recording process according to claim 1, wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording element comprising a photoconductive quinoline compound carrying in the two-position an imino group substituted with a phenyl group.
Claim 8
Dependent Claim
34 words
A recording process according to claim 1, wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording element comprising a photoconductive quinoline compound carrying in the two-position an oxime group.
Claim 9
Dependent Claim
34 words
A recording process according to claim 1, wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording element comprising a photoconductive quinoline compound carrying in the two-position a hydrazone group.
Claim 10
Dependent Claim
34 words
A recording process according to claim 1, wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording element comprising a photoconductive quinoline compound carrying an oxygen atom in the four-position.
Claim 11
Dependent Claim
34 words
A recording process according to claim 1, wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording element comprising a photoconductive quinoline compound carrying a sulphur atom in the four-position.
Claim 12
Dependent Claim
33 words
A recording process, according to claim 1, wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording element comprising a photoconductive quinoline compound carrying in the four-position a group.
Claim 13
Dependent Claim
39 words
A recording process according to claim 1, wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording element comprising a photoconductive quinoline compound carrying in the four-position an imino group substituted with a phenyl group.
Claim 14
Dependent Claim
34 words
A recording process according to claim 1, wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording element comprising a photoconductive quinoline compound carrying in the four-position an oxime group.
Claim 15
Dependent Claim
34 words
A recording process according to claim 1, wherein a pattern of increased conductivity is produced image-wise in a photoconductive insulating recording element comprising a photoconductive quinoline compound carrying in the four-position a hydrazone group.
Claim 16
Dependent Claim
57 words
A method for recording information according to claim 1, comprising the steps of electrostatically charging and information-wise exposing the recording element to electromagnetic radiation, thereby increasing the conductivity of the radiation struck areas and carrying off the electrostatic charge in said areas, and developing the resulting electrostatic Pg,77 charge pattern by means of an electrostatically attractable material.
Claim 17
Dependent Claim
78 words
A recording material comprising a photoconductive insulating recording element capable of being electrostatically charged in the absence of activating electromagnetic radiation and capable of retaining the applied charge for a period of time long enough to produce thereon a developed electrostatic charge pattern, carried on a layer or support of lower resistivity and characterized in that said recording element contains at least 10 percent by weight of a photoconductive compound corresponding to one of the following general formula:
Claim 18
Dependent Claim
27 words
A recording material according to claim 15, wherein said layer or support has a resistivity at least 102 as low as that of the recording element itself.
Claim 19
Dependent Claim
14 words
A recording material according to claim 15, wherein the support is a paper support.
Claim 20
Dependent Claim
22 words
A recording material according to claim 15, wherein the support is an insulating transparent resin support coated with a transparent electroconductive interlayer.
Claim 21
Dependent Claim
13 words
A recording material according to claim 15, wherein said binder is a polymer.
Claim 22
Dependent Claim
14 words
A recording material according to claim 19, wherein said binder is a halogen-containing polymer.
Claim 23
Dependent Claim
15 words
A recording material according to claim 20, wherein the halogen-containing polymer contains vinyl chloride units.
Claim 24
Dependent Claim
27 words
A recording material according to claim 15, wherein the photoconductive compound is used in admixture with a spectral sensitizing agent increasing the photosensitivity of the recording element.
Claim 25
Dependent Claim
20 words
A recording material according to claim 15, wherein the photoconductive compound is used in admixture with a spectral sensitizing dye.
Claim 26
Dependent Claim
41 words
A recording material according to claim 15, wherein the 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 27
Dependent Claim
24 words
A recording material according to claim 15, wherein the photoconductive recording element has an optical density not higher than 0.30 for substantially visible light.
Claim 28
Dependent Claim
21 words
A recording material according to claim 23, wherein the said dye is a triarylmethane dye, xanthene dye or a methine dye.
Claim 29
Dependent Claim
14 words
A recording material according to claim 15, wherein the recording element contains 7-dialkylamino-quinoline-2-one compound.
Claim 30
Dependent Claim
15 words
A recording material according to claim 15, wherein the photoconductive compound is 1-ethyl-3-phenyl-7-diethylamino-2-(1H)-quinolone or 1-ethyl-3-phenyl-7-dimethylamino-2(1H)-quinolone.
Claim 31
Dependent Claim
31 words
A recording material according to claim 15 suitable for use in an electrophotographic process, and wherein the recording element is a solid layer having a dark-resistivity of at least 108 ohm/cm.
Claim 32
Dependent Claim
34 words
In an improved process for the production of a phosphor pattern on a cathode-ray tube screen the improvement wherein said phosphor pattern contains a photoconductive compound corresponding to one of the following general formula:
Claim 33
Dependent Claim
21 words
A process according to claim 30, wherein the phosphor pattern before heating is fixed with a thermolyzable polymer layer or coating.
Claim 34
Dependent Claim
23 words
A process according to claim 31, wherein the polymer forming said layer or coating is a polyacrylic aCid ester or polymethacrylic acid ester.
Claim 35
Dependent Claim
13 words
The process of claim 1 wherein said photoconductive compound is 1-ethyl-3-phenyl-7-diethylamino-2(1H)-quinolone or 1-ethyl-3-phenyl-7-dimethylamino-2(1H)-quinolone.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |