US3206729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for ascertaining from a distance the electrical conditions of a switching device
Assignee: Individual
•
Filing: 1961-12-22
•
Granted: 1965-09-14
•
Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 Longcroft Cecil Talbot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:45
CPC Classifications
G; G08; G08B; G08B25/00; G08B25/14; H; H03; H03M; H03M11/00; H03M11/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2244700A
Cited
US2446643A
Cited
US2621241A
Cited
US2813986A
Cited
US2872664A
Cited
US3003143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |