US3445814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for interrogating remote stations via power lines of an electrical distribution network
Assignee: Electrometre SA
•
Filing: 1964-03-24
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Granted: 1969-05-20
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Expires: 1984-03-24
Abstract
No abstract record available.
Inventors
- 👤 Alfred Spalti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:47
CPC Classifications
H; H02; H02J; H02J13/00; H02J13/13; H02J13/1311; H02J13/1313; H02J13/18; H02J13/333; Y; Y02; Y02B; Y02B90/00; Y02B90/20; Y02E; Y02E60/00; Y04; Y04S; Y04S40/00; Y04S40/12; Y04S40/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2357995A
Cited
US2287786A
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US2581056A
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US2719284A
Cited
US2672598A
Cited
US2981940A
Cited
US3164771A
Cited
US3266018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |