US3639640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatographic recording element
Assignee: Plastic Coating Corp
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Filing: 1969-02-27
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Granted: 1972-02-01
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Expires: 1989-02-27
Abstract
Abstract AN ELECTROSTATOGRAPHIC RECORDING ELEMENT CONTAINING A LITHOPONE PIGMENT IN THE DIELECTRIC, INSULATING LAYER OF SAID ELEMENT. THE ELECTROSTATOGRAPHIC RECORDING ELEMENTS OF THIS INVENTION ARE USEFUL IN BOTH DIRECT AND TRANSFER ELECTROSTATIC RECORDING PROCESSES.
Inventors
- 👤 Morgan E Gager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:19
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/0217; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2475
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |