US3304441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parameter variation monitor
Assignee: Monsanto Co
•
Filing: 1964-07-31
•
Granted: 1967-02-14
•
Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Pelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:40
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/73; G; G01; G01K; G01K3/00; G01K3/005
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
MONITORING CIRCUITRY COMPRISING IN COMBINATION: (A) AN SCR HAVING ANODE, GATE AND CATHODE ELECTRODES, (B) AN ALTERNATING CURRENT POWER SUPPLY HAVING AN END TERMINAL AND A FURTHER TERMINAL, (C) MEANS CONNECTING SAID FURTHER TERMINAL TO A COMMON CONDUCTOR, (D) A LOAD IMPEDANCE, (E) A RECTIFIER, (F) MEANS CONNECTING SAID LOAD IMPEDANCE, SAID RECTIFIER AND THE ANODE-CATHODE PATH OF SAID SCR IN SERIES BETWEEN SAID END TERMINAL AND SAID COMMON CONDUCTOR WITH SAID RECTIFIER POLED TO APPLY A POSITIVE DIRECT CURRENT POTENTIAL TO SAID ANODE, (G) MEANS FOR TRIGGERING SAID SCR INTO CONDUCTION, (H) A RESET SWITCH CONNECTED IN SERIES BETWEEN SAID RECTIFIER AND SAID ANODE ELECTRODE, (I) AND A FILTER INCLUDING A CAPACITOR CONNECTED BETWEEN SAID FURTHER TERMINAL AND A POINT BETWEEN SAID ANODE AND SAID RESET SWITCH.
References Cited (Backward Citations)
US2629073A
Cited
US2813235A
Cited
US3075187A
Cited
US3127589A
Cited
US3136877A
Cited
US3179814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |