US3861913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic charge generation layer
Assignee: International Business Machines Corp
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Filing: 1972-03-31
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Granted: 1975-01-21
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Expires: 1992-03-31
Abstract
Abstract An electrophotographic plate comprising a conductive substrate, a charge transport layer and a charge generation layer consisting essentially of from 5 to 35 percent by weight tellurium and from 0.5 to 20 percent by weight arsenic, with the substantial balance being vitreous selenium.
Inventors
- 👤 Charles Chiou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:35
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/043; G03G5/0433; G03G5/0436
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
31 words
An electrophotographic plate as claimed in claim 1 wherein the charge generation layer comprises from 2 to 10 percent by weight arsenic and from 25 to 30 percent by weight tellurium.
Claim 2
Dependent Claim
21 words
An electrophotographic plate as claimed in claim 1 wherein the charge generation layer covers a charge transport layer of vitreous selenium.
Claim 3
Dependent Claim
22 words
An electrophotographic plate as claimed in claim 1 wherein the charge generation layer covers a charge transport layer comprising an organic photoconductor.
Claim 4
Dependent Claim
25 words
An electrophotographic plate as claimed in claim 1 wherein the charge generation layer is covered by a charge transport layer comprising polyester resin and trinitrofluorenone.
Claim 5
Dependent Claim
26 words
An electrophotographic plate as claimed in claim 1 wherein the charge generation layer is covered by a charge transport layer comprising oxadiazole and a polyester resin.
References Cited (Backward Citations)
US2863768A
Cited
US3077386A
Cited
US3041166A
Cited
US3355289A
Cited
US3350595A
Cited
US3484237A
Cited
US3712810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |