US2468832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signaling system
Assignee: Individual
•
Filing: 1947-09-09
•
Granted: 1949-05-03
•
Expires: 1967-09-09
Abstract
No abstract record available.
Inventors
- 👤 Luke H Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:45
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/02; H03C1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2114336A
Cited
US2285896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |