US3124738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overvoltage protection apparatus
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
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Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:53
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/125; H02H7/1252; H02H3/00; H02H3/02; H02H3/025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
A CIRCUIT FOR PREVENTING A VOLTAGE RISE IN THE OUTPUT OF A DIRECT CURRENT POWER SUPPLY COMPRISING A SOURCE OF ALTERNATING CURRENT, A LOAD, A BRIDGE CONNECTED SOLID STATE RECTIFIER INCLUDING A PAIR OF CONTROLLED RECTIFIERS, THE RECTIFIER BRIDGE ADAPTED TO BE CONNECTED IN SERIES BETWEEN THE ALTERNATING CURRENT SOURCE AND THE LOAD, A PAIR OF ZENER DIODES CONNECTED IN SERIES ACROSS THE LOAD, AND A RELAY SWITCH INCLUDING NORMALLY CLOSED CONTACTS AND AN OPERATING COIL, THE SWITCH CONTACTS CONNECTED IN SERIES BETWEEN THE SOURCE OF ALTERNATING CURRENT AND THE RECTIFIER, THE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |