US3214672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inverter system
Assignee: ELGAR ELECTRONICS Corp A CORP OF
•
Filing: 1962-01-04
•
Granted: 1965-10-26
•
Expires: 1982-01-04
Abstract
No abstract record available.
Inventors
- 👤 Watkins Kenneth Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:54
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/525; H02M7/527; H02M7/445
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
AN INVERTER CIRCUIT ARRANGEMENT WHICH INCLUDES A DIRECT CURRENT SUPPLY, OUTPUT TERMINALS, AT LEAST TWO CONTROLLABLE RECTIFIER DEVICES OPERABLE ALTERNATIVELY TO CONNECT THE DIRECT CURRENT SUPPLY TO THE OUTPUT TERMINALS DURING POSITIVE AND NEGATIVE HALF CYCLES RESPECTIVELY, A REFERENCE VOLTAGE WAVEFORM GENERATOR, MEANS FOR COMPARING THE REFERENCE VOLTAGE WAVEFORM WITH THE OUTPUT VOLTAGE, AND MEANS FOR RENDERING THE RESPECTIVE RECTIFIER DEVICE NON-CONDUCTING WHEN THE OUTPUT VOLTAGE EXCEEDS THE REFERENCE VOLTAGE BY A PREDETERMINED AMOUNT AND CONDUCTING WHEN THE OUTPUT VOLTAGE IS LESS THAN THE REFERENCE VOLTAGE BY A PREDETERMINED AMOUNT.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |