Patent US3219911A successfully refreshed from Google Patents.
US3219911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overload protection circuit
Assignee: RTX Corp
•
Filing: 1960-08-26
•
Granted: 1965-11-23
•
Expires: 1980-08-26
Abstract
No abstract record available.
Inventors
- 👤 Karl L Burfeindt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:38
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/565; G05F1/569; G05F1/573; G05F1/5735
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A POWER SUPPLY OVERLOAD PROTECTION CIRCUIT INCLUDING IN COMBINATION A VOLTAGE SOURCE HAVING A PAIR OF TERMINALS, A VARIABLE IMPEDANCE ELEMENT HAVING A FIRST TERMINAL AND A CONTROL TERMINAL AND A COMMON REFERENCE TERMINAL, MEANS CONNECTING ONE TERMINAL OF THE SOURCE TO THE FIRST TERMINAL OF THE ELEMENT, MEANS PROVIDING A CONTROL VOLTAGE, MEANS COUPLING THE CONTROL VOLTAGE TO THE CONTROL TERMINAL OF THE ELEMENT, DIRECT-CURRENT AMPLIFYING MEANS PROVIDING AN OUTPUT AND HAVING AN INPUT TERMINAL AND A REFERENCE TERMINAL, THE AMPLIFYING MEANS HAVING A UNILATERAL INPUT CHARACTERISTIC, MEANS CONNECTING
References Cited (Backward Citations)
US2912635A
Cited
US2976475A
Cited
US2967251A
Cited
US2904742A
Cited
US2915693A
Cited
US2888633A
Cited
US3131344A
Cited
US2974270A
Cited
US3105188A
Cited
US3078410A
Cited
US3072842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |