Patent US2463535A successfully refreshed from Google Patents.
US2463535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device
Assignee: AT&T Inc
•
Filing: 1946-12-13
•
Granted: 1949-03-08
•
Expires: 1966-12-13
Abstract
No abstract record available.
Inventors
- 👤 Hecht George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:40
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/04; H04B14/044; H01; H01J; H01J31/00; H01J31/02; H01J31/04; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/28; H03M1/285; H03M1/32; H03M13/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |