Patent US3036234A successfully refreshed from Google Patents.
US3036234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge devices employing secondary electron emission
Assignee: AT&T Inc
•
Filing: 1959-09-28
•
Granted: 1962-05-22
•
Expires: 1979-09-28
Abstract
No abstract record available.
Inventors
- 👤 George C Dacey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:33
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/32; H01J25/00; H01J25/50; H01J25/52; H01J25/58; H01J25/587
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |