US3625684A
Expired / Lapsed
US
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Electroconductive layers for use in electrographic and electrophotographic recording elements
Assignee: Agfa Gevaert NV
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Filing: 1969-04-29
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Granted: 1971-12-07
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Expires: 1989-04-29
Abstract
Abstract AN ELECTROCONDUCTIVE POLYMERIC FILM USEFUL IN CERTAIN RECORDING ELEMENTS, ESPECIALLY ELECTROGRAPHIC RECORDING ELEMENTS INCLUDING A PHOTOCONDUCTIVE LAYER OR OTHER ELECTROSTATIC CHARGE RETAINING LAYER IN ELECTRICAL CONTACT WITH SUCH FILM, IS COMPOSED OF RANDOMLY DISTRIBUTED RECURRING UNITS HAVING THE FOLLOWING FORMULAE: -(CH(-CH2-R(+))-CH2-O)- X(-) (A) -(CH(-CH2-CL)-CH2-O)- (B) WHEREIN UNITS (A) CONSTITUTE BETWEEN ABOUT 25-95 MOLE PERCENT OF THE TOTAL AMOUNT OF SUCH RECURRING UNITS IN THE POLYMER, R IS A QUATERNARY AMMONIUM, PHOSPHONIUM, OR TERTIARY SULFONIUM GROUP AND X IS AN ANION.
Inventors
- 👤 Albert Lucien Poot
- 👤 Jozef Frans Willems
- 👤 Francis Jeanne Sels
- 👤 Johannes Josephus Vanheertum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:15
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/105; G03G5/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |