US2666137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray storage tube
Assignee: Individual
•
Filing: 1945-12-10
•
Granted: 1954-01-12
•
Expires: 1965-12-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederic Cunningham
- 👤 Alfred G Emslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:57
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/2806; H; H01; H01J; H01J31/00; H01J31/08; H01J31/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB513766A
Cited
US2416895A
Cited
US2422135A
Cited
US2403562A
Cited
US2464420A
Cited
US2491450A
Cited
US2512144A
Cited
US2437173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |