Patent US4307167A successfully refreshed from Google Patents.
US4307167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Layered electrophotographic plate having tetramethyl benzidene based disazo dye
Assignee: IBM Information Products Corp
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Filing: 1980-03-03
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Granted: 1981-12-22
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Expires: 2000-03-03
Abstract
Abstract A layered electrophotographic plate having a triaryl pyrazoline containing charge transport layer and a charge generation layer having a photogenerating dye of the composition: ##STR1##
Inventors
- 👤 Larry D. Bowden
- 👤 Robert B. Champ
- 👤 Michael T. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:10
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0679
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
An electrophotographic element, comprising: an electrically conductive layer; a charge generation layer adjacent said conductive layer, responsive to actinic radiation to generate an electron-hole pair, and having the composition ##STR9## and a charge transport layer adjacent the charge generation layer.
Claim 2
Dependent Claim
40 words
An electrophotographic element, comprising: an electrically conductive layer; a charge generation layer adjacent said conductive layer, responsive to actinic radiation to generate an electron-hole pair, and having the composition ##STR9## and a charge transport layer adjacent the charge generation layer.
Claim 3
Dependent Claim
17 words
The electrophotographic element defined in claim 1 wherein the charge generation layer is of the composition ##STR10##
Claim 4
Dependent Claim
16 words
The electrophotographic element defined in claim 1 or 2 wherein the charge transport layer is p-type.
Claim 5
Dependent Claim
19 words
The electrophotographic element defined in claim 1 or 2 wherein the charge transport layer contains a triaryl pyrazoline molecule.
Claim 6
Dependent Claim
21 words
A layered electrophotographic plate having a charge transport layer and a charge generation layer containing the photoactive, tetramethylbenzidine based dye ##STR11##
Claim 7
Dependent Claim
21 words
A layered electrophotographic plate having a charge transport layer and a charge generation layer containing the photoactive, tetramethylbenzidine based dye ##STR11##
Claim 8
Dependent Claim
12 words
The layered electrophotographic plate of claim 5 wherein the dye comprises ##STR12##
References Cited (Backward Citations)
US3898084A
Cited
US3824099A
Cited
US3837851A
Cited
US4052210A
Cited
US4123270A
Cited
US4150987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |