US2507972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device and associated circuits
Assignee: RCA Corp
•
Filing: 1944-12-08
•
Granted: 1950-05-16
•
Expires: 1964-12-08
Abstract
No abstract record available.
Inventors
- 👤 Andrew V Haeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:45
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2088722A
Cited
US2167201A
Cited
US2222902A
Cited
US2242249A
Cited
US2287845A
Cited
US2284405A
Cited
US2353743A
Cited
US2353742A
Cited
US2329779A
Cited
US2329780A
Cited
US2329778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |