US2745903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signaling system
Assignee: General Dynamics Corp
•
Filing: 1952-05-10
•
Granted: 1956-05-15
•
Expires: 1972-05-10
Abstract
No abstract record available.
Inventors
- 👤 Kessler Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:25
CPC Classifications
H; H04; H04M; H04M5/00; H04M5/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US976961A
Cited
US2076656A
Cited
US2248955A
Cited
US2376275A
Cited
US2595106A
Cited
US2558571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |