Patent US2863158A successfully refreshed from Google Patents.
Patent US2839679A successfully refreshed from Google Patents.
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 16:02
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/58; H01J31/60; H01J31/62
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2149977A
Cited
US2193101A
Cited
US2324504A
Cited
US2373396A
Cited
US2535817A
Cited
US2415842A
Cited
US2500633A
Cited
US2549072A
Cited
US2640162A
Cited
US2687492A
Cited
US2594740A
Cited
US2777060A
Cited
US2757233A
Cited
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 |