US2839679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Half-tone memory tube
Assignee: Individual
•
Filing: 1952-05-16
•
Granted: 1958-06-17
•
Expires: 1972-05-16
Abstract
No abstract record available.
Inventors
- 👤 Franklin H Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:19
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/58; H01J31/60; H01J31/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2193101A
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US2324504A
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US2373396A
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US2535817A
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US2415842A
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US2500633A
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US2549072A
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US2640162A
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US2687492A
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US2594740A
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US2777060A
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US2757233A
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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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |