US2860324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power line signalling system
Assignee: International Standard Electric Corp
•
Filing: 1953-11-25
•
Granted: 1958-11-11
•
Expires: 1973-11-25
Abstract
No abstract record available.
Inventors
- 👤 Berger Francois Charle Maurice
- 👤 Roussel Paul Antoine Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:47
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/54; H04B3/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1928610A
Cited
US2192061A
Cited
US2357995A
Cited
US2428011A
Cited
US2366537A
Cited
US2398490A
Cited
US2594371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |