US3992203A
Expired / Lapsed
US
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Polyphenylenevinylene photoconductor composition sensitized with a 1,4-bis (styryl) benzene derivative
Assignee: Pentacon GmbH Foto und Feinwerktechnik
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Filing: 1975-04-18
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Granted: 1976-11-16
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Expires: 1995-04-18
Abstract
Abstract Electrophotographic recording material is disclosed comprising at least one polyphenylenevinylene having a molecular weight greater than 2,000 g/mol and at least one 1,4-bis (styryl) benzene derivative.
Inventors
- 👤 Hans-Heinrich Horhold
- 👤 Joachim Gottschaldt
- 👤 Regina Bergmann
- 👤 Johannes Opfermann
- 👤 Walter Seliger
- 👤 Siegfried Augst
- 👤 Hartmut Arnstadt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:07
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0672; G03G5/07
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
27 words
Electrophotographic recording material comprising at least one photoconductive polyphenylenevinylene having a mean molecular weight greater than 2,000 g/mol in admixture with at least one 1,4-bis(styryl) benzene derivative.
Claim 2
Dependent Claim
27 words
Electrophotographic recording material comprising at least one photoconductive polyphenylenevinylene having a mean molecular weight greater than 2,000 g/mol in admixture with at least one 1,4-bis(styryl) benzene derivative.
Claim 3
Dependent Claim
61 words
Electrophotographic recording material according to claim 1, wherein the or each 1,4-bis-(styryl) benzene derivative corresponds to formula (3). ##SPC5## in which at least one of the radicals R 7 and R 8 signifies a cyano group and the remaining radicals R 9 to R 14 are similar or different and signify hydrogen, cyano, alkoxy, alkyl, aryl, halogen, nitro or amino groups.
Claim 4
Dependent Claim
22 words
Electrophotographic recording material according to claim 1, wherein the mass proportion of the or each 1,4-bis(styryl)benzene derivative amounts to 0.5 to 30%.
References Cited (Backward Citations)
GB1345692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |