Patent US2952796A successfully refreshed from Google Patents.
US2952796A
Expired / Lapsed
US
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Electrostatic printing tube
Assignee: AB Dick Co
•
Filing: 1957-05-13
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Granted: 1960-09-13
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Expires: 1977-05-13
Abstract
No abstract record available.
Inventors
- 👤 Robert W Crews
- 👤 Jr Casper W Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:17
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; H01J31/06; H01J31/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2202376A
Cited
US2289500A
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US2273793A
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US2361766A
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US2291476A
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GB741148A
Cited
US2829025A
Cited
US2811669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |