US2122102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric signaling system
Assignee: Individual
•
Filing: 1936-02-27
•
Granted: 1938-06-28
•
Expires: 1956-02-27
Abstract
No abstract record available.
Inventors
- 👤 Lundell Torsten Adil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:28
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H01; H01J; H01J31/00; H01J31/02; H01J31/06; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/526
Claims Analysis
Total Claims: 0
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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) | 1941-06-27 | 1941-12-27 | 1942-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-27 | 1945-12-27 | 1946-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-27 | 1949-12-27 | 1950-06-28 | $7700.00 | Window Closed / Lapsed |