Patent US3588609A successfully refreshed from Google Patents.
US3588609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protector circuit for electrical measuring system
Assignee: BUCK ENGINEERING Co Inc
•
Filing: 1968-08-07
•
Granted: 1971-06-28
•
Expires: 1988-08-07
Abstract
Abstract A TEMPERATURE SENSITIVE SWITCH MEANS IS PROVIDED IN SERIES CIRCUIT PATH BETWEEN AN INPUT TERMINAL AND MEANS OF A RESISTANCE MEASURING APPARATUS FOR DISCONNECTING THE RESISTANCE MEANS FROM SAID INPUT TERMINAL UPON THE CONNECTION THERETO OF AN EXCESSIVE VOLTAGE SOURCE.
Inventors
- 👤 Harry Joseph Keen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:54
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02; G01R27/14; G01R1/00; G01R1/36; H; H02; H02H; H02H3/00; H02H3/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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 |