US2395132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical signaling system
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1941-05-27
•
Granted: 1946-02-19
•
Expires: 1961-05-27
Abstract
No abstract record available.
Inventors
- 👤 Mackenzie John Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:50
CPC Classifications
H; H02; H02J; H02J13/00; H02J13/13; H02J13/1311; H02J13/1313; Y; Y02; Y02E; Y02E60/00; Y04; Y04S; Y04S40/00; Y04S40/12; Y04S40/121
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) | 1949-02-18 | 1949-08-20 | 1950-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-02-18 | 1953-08-20 | 1954-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-02-18 | 1957-08-20 | 1958-02-19 | $7700.00 | Window Closed / Lapsed |