US3932418A
Expired / Lapsed
US
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Electrophotographic material
Assignee: Agfa Gevaert NV
•
Filing: 1973-10-18
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Granted: 1976-01-13
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Expires: 1993-10-18
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 1,2,3,4-tetrahydroquinoline. The photoconductive compound can be chemically and spectrally sensitized and charged either negatively or positively.
Inventors
- 👤 Wilhelmus Janssens
- 👤 Johannes Josephus Vanheertum
- 👤 Robert Joseph Pollett
- 👤 Hendrik Hubert Sneyers
- 👤 Jozef Aime Dierckx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:36
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0646; G03G5/065; G03G5/0651; G03G5/0661
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
26 words
A chemical compound having photoconductive properties and corresponding to the formula: ##SPC21## where n is 1, X and Y are hydrogen, R is hydrogen or methyl
Claim 2
Dependent Claim
26 words
A chemical compound having photoconductive properties and corresponding to the formula: ##SPC21## where n is 1, X and Y are hydrogen, R is hydrogen or methyl
Claim 3
Dependent Claim
12 words
A compound according to claim 1 wherein R is a methyl group.
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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |