US3588860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long distance visual monitor of electrical current or voltage input to an electrical load condition
Assignee: Individual
•
Filing: 1968-12-31
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Granted: 1971-06-28
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Expires: 1988-12-31
Abstract
Abstract UNATTENDED ELECTRICAL FACILITIES SUCH AS GROUND, EARTH, WATER OR SURFACE EQUIPMENT, E.G., PIPELINE CATHODIC PROTECTION SYSTEMS, ARE PROVIDED WITH AN INDICATOR SUFFICIENTLY VISIBLE FOR AIRPLANE PATROL INSPECTION. THE VISUAL INDICATOR IS TIED INTO EQUIPMENT AND IS A MONITORING DEVICE OPERATING AS A FUNCTION OF ELECTRICAL POWER LOAD AND INDICATES CHANGES IN EITHER VOLTAGE, AMPERAGE OR WATTAGE OF THE FACILITY.
Inventors
- 👤 Louis C Hayward Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:48
CPC Classifications
G; G08; G08B; G08B5/00; C; C23; C23F; C23F13/00; C23F13/02; C23F13/04
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |