US3241555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charging and discharging circuit for ventricular defibrillator
Assignee: MSA Safety Inc
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Filing: 1962-06-25
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Granted: 1966-03-22
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Expires: 1982-06-25
Abstract
No abstract record available.
Inventors
- 👤 Caywood William Parks
- 👤 Robert S Kush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:51
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3904; A61N1/3906; A61N1/3912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A VENTRICULAR DEFIBRILLATOR FOR DELIVERING PULSES OF ELECTRIC CURRENT FROM A PAIR OF CAPACITORS TO A PAIR OF ELECTRODES IN CONTACT WITH A PATIENT''S BODY, THE COMBINATION COMPRISING A CONTINUOUSLY OPERATIVE CHARGING CIRCUIT THAT INCLUDES A SOURCE OF HIGH VOLTAGE DIRECT CURRENT AND THE TWO CAPACITORS AND TWO HIGH RESISTANCE LIMITING AND ISOLATING RESISTORS, EACH CAPACITOR BEING CONNECTED IN SERIES WITH A SEPARATE ONE OF THE RESISTORS AND THE TWO SERIESCONNECTED RESISTOR-CAPACITOR COMBINATIONS BEING CONNECTED IN PARALLEL TO THE CURRENT SOURCE WITH THE RESISTORS BEING CONNECTED BETWEEN THE CAPACITORS AND THE SAME TERMINAL OF THE CURRENT SOURCE; AND AN INTERMITTENTLY OPERATIVE DISCHARGING CIRCUIT THAT INCLUDES DISCHARGE MEANS FOR DISCHARGING THE CAPACITORS SEPARATELY AND SUCCESSIVELY THROUGH THE ELECTRODES, THE DISCHARGING MEANS BEING OPERATIVE TO REVERSE WITH RESPECT TO THE ELECTRODES THE POLARITY OF THE SECOND CAPACITOR DISCHARGE FROM THAT OF THE FIRST CAPACITOR DISCHARGE.
Claim 2
Dependent Claim
144 words
IN A VENTRICULAR DEFIBRILLATOR FOR DELIVERING PULSES OF ELECTRIC CURRENT FROM A PAIR OF CAPACITORS TO A PAIR OF ELECTRODES IN CONTACT WITH A PATIENT''S BODY, THE COMBINATION COMPRISING A CONTINUOUSLY OPERATIVE CHARGING CIRCUIT THAT INCLUDES A SOURCE OF HIGH VOLTAGE DIRECT CURRENT AND THE TWO CAPACITORS AND TWO HIGH RESISTANCE LIMITING AND ISOLATING RESISTORS, EACH CAPACITOR BEING CONNECTED IN SERIES WITH A SEPARATE ONE OF THE RESISTORS AND THE TWO SERIESCONNECTED RESISTOR-CAPACITOR COMBINATIONS BEING CONNECTED IN PARALLEL TO THE CURRENT SOURCE WITH THE RESISTORS BEING CONNECTED BETWEEN THE CAPACITORS AND THE SAME TERMINAL OF THE CURRENT SOURCE; AND AN INTERMITTENTLY OPERATIVE DISCHARGING CIRCUIT THAT INCLUDES DISCHARGE MEANS FOR DISCHARGING THE CAPACITORS SEPARATELY AND SUCCESSIVELY THROUGH THE ELECTRODES, THE DISCHARGING MEANS BEING OPERATIVE TO REVERSE WITH RESPECT TO THE ELECTRODES THE POLARITY OF THE SECOND CAPACITOR DISCHARGE FROM THAT OF THE FIRST CAPACITOR DISCHARGE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |