US2853646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: Individual
•
Filing: 1954-06-07
•
Granted: 1958-09-23
•
Expires: 1974-06-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Wilson S Geisler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:31
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/22; H01J25/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2287845A
Cited
US2374810A
Cited
US2314794A
Cited
US2293151A
Cited
US2333295A
Cited
US2752495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |