US2767344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic amplifier
Assignee: AT&T Inc
•
Filing: 1949-12-30
•
Granted: 1956-10-16
•
Expires: 1969-12-30
Abstract
No abstract record available.
Inventors
- 👤 Marion E Hines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:35
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/11
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1931874A
Cited
US2064469A
Cited
US2300052A
Cited
US2584802A
Cited
US2578434A
Cited
US2610308A
Cited
US2615141A
Cited
US2707759A
Cited
US2652513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |