Patent US4456672A successfully refreshed from Google Patents.
US4456672A
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US
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Electrophotographic recording materials containing triazole charge carrier-transporting compounds
Assignee: BASF SE
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Filing: 1983-04-27
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Granted: 1984-06-26
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Expires: 2003-04-27
Abstract
Abstract Electrophotographic recording materials which comprise an electrically conductive base, charge carrier-producing compounds (sensitizers), and compounds which are charge carrier-transporting when exposed to light, possess high photoconductivity and low conductivity in the dark, and contain, as charge carrier-transporting compounds, 1,2,3-triazoles of the fomula ##STR1## are used for reprographic purposes and for the production of electrophotographic printing plates, in particular offset printing plates.
Inventors
- 👤 Heinz Eilingsfeld
- 👤 Karl-Heinz Etzbach
- 👤 Gerhard Hoffmann
- 👤 Peter Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:32
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/02; C07D249/04; C07D249/06; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0633
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
85 words
An electrophotographic recording material comprising an electrically conductive base, charge carrier-producing compounds and charge carrier-transporting compounds, which contains, as charge carrier-transporting compounds, those of the formula (I) ##STR4## where R 1 and R 2 are identical or different and are each hydrogen, alkyl, allyl, benzyl or unsubstituted or substituted phenyl, or R 1 and R 2 together are ##STR5## where R 5 is NR 1 R 2 , R 3 is alkyl or phenyl and R 4 is alkyl, vinyl, allyl, carbalkoxy, acryloyl or methacryloyl.
Claim 2
Dependent Claim
85 words
An electrophotographic recording material comprising an electrically conductive base, charge carrier-producing compounds and charge carrier-transporting compounds, which contains, as charge carrier-transporting compounds, those of the formula (I) ##STR4## where R 1 and R 2 are identical or different and are each hydrogen, alkyl, allyl, benzyl or unsubstituted or substituted phenyl, or R 1 and R 2 together are ##STR5## where R 5 is NR 1 R 2 , R 3 is alkyl or phenyl and R 4 is alkyl, vinyl, allyl, carbalkoxy, acryloyl or methacryloyl.
Claim 3
Dependent Claim
37 words
An electrophotographic recording material as claimed in claim 1, wherein, in formula (I), R 1 and R 2 are each alkyl, benzyl or phenyl, R 3 is alkyl or phenyl and R 4 is alkyl or carbalkoxy.
Claim 4
Dependent Claim
35 words
An electrophotographic recording material as claimed in claim 1, comprising an electrically conductive base, a layer containing charge carrier-producing compounds and another layer containing charge carrier-transporting compounds of the formula (I) given in claim 1.
Claim 5
Dependent Claim
35 words
An electrophotographic recording material as claimed in claim 1, consisting essentially of an electrically conductive base and a layer containing charge carrier-producing compounds and charge carrier-transporting compounds of the formula (I) given in claim 1.
References Cited (Backward Citations)
NL247071A
Cited
DE1522497A1
Cited
DE2737334A1
Cited
JPS5782844A
Cited
JPS57191646A
Cited
JPS589150A
Cited
JPS589151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |