US3622341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc oxide and titanium oxide sensitized by azo dyes
Assignee: RCA Corp
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Filing: 1969-08-01
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Granted: 1971-11-23
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Expires: 1989-08-01
Abstract
Abstract A spectrally sensitized electrophotographic recording element includes a photoconductive layer that comprises a zinc oxide and/or titanium dioxide photoconductor in a film-forming resin and a small quantity of at least one azo dye that has either an o,o''-dihydroxy or an o-amino-o''-hydroxy azo structure.
Inventors
- 👤 Wndell Maurice Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:40
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0677; G03G5/09
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
26 words
Spectrally sensitized electrophotographic material as described in claim 1 wherein said photoconductor is photoconductive titanium dioxide and said azo dye is a titanium azo dye complex.
Claim 2
Dependent Claim
26 words
Spectrally sensitized electrophotographic material as described in claim 1 wherein said photoconductor is photoconductive zinc oxide and said azo dye is a zinc azo dye complex.
Claim 3
Dependent Claim
50 words
A spectrally sensitized electrophotographic recording element comprising a photoconductive layer of zinc oxide in a film-forming binder and up to about 0.5 percent by weight with respect to the weight of said zinc oxide of a zinc azo dye complex of one of the group of azo dyes consisting of
Claim 4
Dependent Claim
32 words
Spectrally sensitized light-sensitive material comprising a photoconductor selected from the group consisting of photoconductive zinc oxide and photoconductive titanium dioxide and at least one azo dye selected from the group consisting of
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |