Patent US4857615A successfully refreshed from Google Patents.
US3605754A
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US
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Double pulse heart defibrillator and method of use
Assignee: South African Inventions Development Corp
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Filing: 1968-09-25
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Granted: 1971-09-20
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Expires: 1988-09-25
Abstract
Abstract A METHOD OF DEFIBRILLATING A HEART, WHICH INCLUDES DEPOLARIZING BY FIRST ELECTRIC PULSE, THOSE HEART MUSCLE FIBRES WHICH ARE IN A RECEPTIVE STATE, AND OF LATER DEPOLARIZING HEART MUSCLE FIBRES BY A SECOND ELECTRICAL PULSE AT A TIME INTERVAL AFTER THE FIRST PULSE, SUFFICIENT TO PERMIT ALL THE HEART MUSCLE FIBRES TO BE SIMULTANEOUSLY IN A RECEPTIVE STATE. THE APPARATUS FOR ENERGY STORAGE CAPACITORS WHICH ARE CHARGED FROM A VARIABLE POWER SUPPLY VIA A CAPACITOR CHARGE AND IMPULSE DISCHARGE INVERTER AND DISCHARGED WHEN DESIRED UNDER THE CONTROL OF A STORED ENERGY MONITOR VIA DAMPING AND SAFETY CIRCUITS TO ENERGIZE ELECTRODES.
Inventors
- 👤 George Gustav Jaros
- 👤 Johannes Petrus Gous
- 👤 Johan Samuel Loubser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:31
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3904; A61N1/3906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |