US3468660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic material comprising a multilayer support having a barrier layer over a duplex paper base
Assignee: Azoplate Corp
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Filing: 1963-02-15
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Granted: 1969-09-23
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Expires: 1983-02-15
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Davenport Jr
- 👤 Alfred L Kratzer
- 👤 Robert W Sapp
- 👤 William T Thomas
- 👤 Heinz H Weichardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:02
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/144; G03G5/10; G03G5/104
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
AN ELECTROPHOTOGRAPHIC MATERIAL COMPRISING A PHOTOCONDUCTIVE INSULATING LAYER ON A SUPPORT, THE LATTER COMPRISING AN ELECTRICALLY CONDUCTIVE LIQUID-IMPERVIOUS BARRIER FILM ON A THROUGH-CONDUCTIVE DUPLEX PAPER BASE, WHICH LATTER COMPRISES AN UPPER CARBON-FILLED LAYER AND A LOWER CARBON-FREE LAYER.
Claim 2
Dependent Claim
38 words
AN ELECTROPHOTOGRAPHIC MATERIAL COMPRISING A PHOTOCONDUCTIVE INSULATING LAYER ON A SUPPORT, THE LATTER COMPRISING AN ELECTRICALLY CONDUCTIVE LIQUID-IMPERVIOUS BARRIER FILM ON A THROUGH-CONDUCTIVE DUPLEX PAPER BASE, WHICH LATTER COMPRISES AN UPPER CARBON-FILLED LAYER AND A LOWER CARBON-FREE LAYER.
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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) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |