US2885592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Travelling wave tube
Assignee: US Philips Corp
•
Filing: 1954-10-04
•
Granted: 1959-05-05
•
Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Robinson Norman Wright
- 👤 Flood Harry Guy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:16
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/26; H01J25/00; H01J25/34; H01J25/36; H01J25/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2802136A
Cited
USRE23647E
Cited
US2516944A
Cited
FR984020A
Cited
US2788465A
Cited
US2757310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |