Patent US4407919A successfully refreshed from Google Patents.
US4407919A
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Electrophotographic plate
Assignee: Mitsubishi Chemical Corp
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Filing: 1982-06-22
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Granted: 1983-10-04
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Expires: 2002-06-22
Abstract
Abstract A double-layered electrophotographic plate having at least a charge generating layer and a charge transporting layer on an electroconductive substrate, wherein said charge transporting layer comprises (a) a dicyano vinyl compound represented by general formula (I): <IMAGE> (I) where R1 and R3 independently represent hydrogen, halogen, cyano, nitro or a substituted- or unsubstituted-arylcarbonyloxy group, and R2 represents hydrogen, halogen, cyano or a substituted- or unsubstituted-arylcarbonyloxy group with the proviso that R1, R2 and R3 are not simultaneously hydrogen, and/or a dicyano vinyl compound represented by general formula (II): <IMAGE> (II) where R4 represents hydrogen, halogen, lower alkyl or aryl group, and (b) an electron-donating organic compound.
Inventors
- 👤 Tetsuo Murayama
- 👤 Shigenori Otsuka
- 👤 Tsunemitsu Tajima
- 👤 Yukihiro Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:38
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0618; G03G5/0612
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
A double-layered electrophotographic plate having at least a charge generating layer and a charge transporting layer on an electroconductive substrate, wherein said charge transporting layer comprises (a) a dicyano vinyl compound represented by general formula (I): ##STR14## where R 1 and R 3 independently represent hydrogen, halogen, cyano, nitro or a substituted- or unsubstituted-arylcarbonyloxy group, and R 2 represents hydrogen, halogen, cyano or a substituted- or unsubstituted-arylcarbonyloxy group with the proviso that R 1 , R 2 and R 3 are not simultaneously hydrogen, and/or a dicyano vinyl compound repreented by general formula (II): ##STR15## where R 4 represents hydrogen, halogen, lower alkyl or aryl group, and (b) an electron-donating organic compound.
Claim 2
Dependent Claim
112 words
A double-layered electrophotographic plate having at least a charge generating layer and a charge transporting layer on an electroconductive substrate, wherein said charge transporting layer comprises (a) a dicyano vinyl compound represented by general formula (I): ##STR14## where R 1 and R 3 independently represent hydrogen, halogen, cyano, nitro or a substituted- or unsubstituted-arylcarbonyloxy group, and R 2 represents hydrogen, halogen, cyano or a substituted- or unsubstituted-arylcarbonyloxy group with the proviso that R 1 , R 2 and R 3 are not simultaneously hydrogen, and/or a dicyano vinyl compound repreented by general formula (II): ##STR15## where R 4 represents hydrogen, halogen, lower alkyl or aryl group, and (b) an electron-donating organic compound.
Claim 3
Dependent Claim
12 words
The double-layered electrophotographic plate of claim 1 wherein R 2 is halogen.
Claim 4
Dependent Claim
16 words
The double-layered electrophotographic plate of claim 1 wherein R 2 is a substituted- or unsubstituted-arylcarbonyloxy group.
Claim 5
Dependent Claim
35 words
The double-layered electrophotographic plate of claim 1 wherein said electron-donating organic compound is selected from the group consisting of a heterocyclic compound; an aromatic hydrocarbon derivative substituted with an electron-donating group; and a hydrozone compound.
Claim 6
Dependent Claim
55 words
The double-layered electrophotographic plate of claim 4 wherein said hydrazone compound is represented by the following general formula (III). ##STR16## where Ar represents a substituted or unsubstituted aromatic hydrocarbon group or an aromatic heterocyclic group, R 5 and R 6 independently represent alkyl, aryl or aralkyl, and n is an integer of 1 or 2.
References Cited (Backward Citations)
US3615384A
Cited
NL7404414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |