US3389704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge circuit for a defibrillator
Assignee: Zenith Electronics LLC
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Filing: 1965-12-06
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Granted: 1968-06-25
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Expires: 1985-12-06
Abstract
No abstract record available.
Inventors
- 👤 Buchowski Roman
- 👤 Louis L Kocsis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:19
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3925; A61N1/3931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN AN ELECTRONIC DEFIBRILLATOR OF THE TYPE EMPLOYING FIRST CAPACITOR MEANS FOR STORING HIGH VOLTAGE ELECTRICAL ENERGY SUPPLIED FROM A DIRECT CURRENT ENERGY SOURCE AND ELECTRODE MEANS FOR DISCHARGING SAID STORED ELECTRICAL ENERGY THROUGH A PATIENT, THE IMPROVEMENT COMPRISING: SECOND CAPACITOR MEANS; A RELAY INCLUDING AN ENERGIZING COIL AND A PAIR OF NORMALLY OPEN CONTACTS; A RESISTANCE COUPLED IN SERIES WITH SAID NORMALLY OPEN CONTACTS ACROSS SAID FIRST CAPACITOR MEANS; A DISCHARGE CIRCUIT FOR SAID SECOND CAPACITOE MEANS; AN ON-OFF SWITCH FOR SAID DEFIBRILLATOR AND INCLUDING MEANS FOR COUPLING SAID SECOND CAPACITOR MEANS TO SAID DIRECT CURRENT SOURCE ONLY WHEN SAID ON-OFF SWITCH IS IN ITS "ON" POSITION; AND FURTHER MEANS FOR COUPLING SAID SECOND CAPACITOR MEANS TO SAID DISCHARGE CIRCUIT ONLY WHEN SAID ONOFF SWITCH IS IN ITS OFF" POSITION AND FOR ENERGIZING SAID RELAY COIL FROM SAID SECOND CAPACITOR MEANS FOR A PREDETERMINED INTERVAL OF TIME.
Claim 2
Dependent Claim
148 words
IN AN ELECTRONIC DEFIBRILLATOR OF THE TYPE EMPLOYING FIRST CAPACITOR MEANS FOR STORING HIGH VOLTAGE ELECTRICAL ENERGY SUPPLIED FROM A DIRECT CURRENT ENERGY SOURCE AND ELECTRODE MEANS FOR DISCHARGING SAID STORED ELECTRICAL ENERGY THROUGH A PATIENT, THE IMPROVEMENT COMPRISING: SECOND CAPACITOR MEANS; A RELAY INCLUDING AN ENERGIZING COIL AND A PAIR OF NORMALLY OPEN CONTACTS; A RESISTANCE COUPLED IN SERIES WITH SAID NORMALLY OPEN CONTACTS ACROSS SAID FIRST CAPACITOR MEANS; A DISCHARGE CIRCUIT FOR SAID SECOND CAPACITOE MEANS; AN ON-OFF SWITCH FOR SAID DEFIBRILLATOR AND INCLUDING MEANS FOR COUPLING SAID SECOND CAPACITOR MEANS TO SAID DIRECT CURRENT SOURCE ONLY WHEN SAID ON-OFF SWITCH IS IN ITS "ON" POSITION; AND FURTHER MEANS FOR COUPLING SAID SECOND CAPACITOR MEANS TO SAID DISCHARGE CIRCUIT ONLY WHEN SAID ONOFF SWITCH IS IN ITS OFF" POSITION AND FOR ENERGIZING SAID RELAY COIL FROM SAID SECOND CAPACITOR MEANS FOR A PREDETERMINED INTERVAL OF TIME.
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) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |