US3617271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitizers having one or more electron-withdrawing groups for organic photoconductors
Assignee: Agfa Gevaert NV
•
Filing: 1969-06-10
•
Granted: 1971-11-02
•
Expires: 1989-06-10
Abstract
Abstract An electrophotographic material comprising an organic photoconductor and as a sensitizer, a compound of the following formulas: WHEREIN: R1, R2, R3 and R4 are hydrogen, halogen, nitro, cyano, carboxyl, carbamoyl, aryl, or fused aromatic nuclei; Y is CH2 or CN2, and z is a chemical bond or -SO2-; R5 is azidosulfonyl or azidocarbonyl, R6 is carboxyl, sulfo, azidocarbonyl, azidosulfonyl or a substituted fused arylene nucleus, and R7 is hydrogen, fused arylene nucleus or other substituent.
Inventors
- 👤 Albert Lucien Poot
- 👤 Walter August Van Den Heuvel
- 👤 Karel Eugeen Verhille
- 👤 Johannes Josephus Vanheertum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:02
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/062; G03G5/0609; G03G5/0612; G03G5/0622; G03G5/0624; G03G5/0635; G03G5/0637
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
26 words
An electrophotographic material according to claim 1 wherein the organic photoconductive substance is a nonpolymeric or polymeric substance containing at least one aromatic or heterocyclic ring.
Claim 2
Dependent Claim
14 words
An electrophotographic material according to claim 1, wherein the organic photoconductive substance is poly-N-vinylcarbazole.
Claim 3
Dependent Claim
37 words
An electrophotographic material according to claim 1, wherein the said compound comprising one or more electron-withdrawing groups is present in an amount comprised between 0.1 to 10 percent by weight relative to the amount of photoconductive substance,
Claim 4
Dependent Claim
18 words
An electrophotographic material according to claim 1, wherein said photoconductive layer is carried on an electrically conducting support.
Claim 5
Dependent Claim
26 words
An electrophotographic material according to claim 5, wherein the photoconductive layer comprises an organic photoconductor in association with natural resins or resinuous condensation or polymerisation products.
Claim 6
Dependent Claim
16 words
An electrophotographic material according to claim 1, wherein the organic photoconductive layer also comprises dyestuff sensitizers.
References Cited (Backward Citations)
US3174854A
Cited
GB1089095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |