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Patent US6047211A successfully refreshed from Google Patents.
US6047211A
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Dual capacitor biphasic defibrillator waveform generator employing selective connection of capacitors for each phase
Assignee: Cardiac Pacemakers Inc
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Filing: 1997-10-01
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Granted: 2000-04-04
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Expires: 2017-10-01
Abstract
Abstract An implantable defibrillator/cardioverter which generates a biphasic defibrillation/cardioversion waveform including a pulse generator comprising two capacitors and a pair of switches for connecting the capacitors in parallel during a first phase and in series during a second phase. The first phase has a small "tilt" between the leading edge voltage and the trailing edge voltage. The second phase has a leading edge voltage which is approximately twice the trailing edge voltage of the first phase.
Inventors
- 👤 David K. Swanson
- 👤 Raymond E. Ideker
- 👤 Greg Walcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:46
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3956; A61N1/3906; A61N1/3912
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
78 words
A method for generating a defibrillation waveform for discharge between at least two electrodes implanted on or about the heart, the method comprising the steps of: discharging a capacitor network in an implantable defibrillator including first and second capacitances, the first capacitance being greater than the second capacitance, by the steps including: partially discharging the first capacitance in a first phase of biphasic waveform; and discharging the second capacitance to complete the first phase of a biphasic waveform.
Claim 2
Independent Claim
78 words
A method for generating a defibrillation waveform for discharge between at least two electrodes implanted on or about the heart, the method comprising the steps of: discharging a capacitor network in an implantable defibrillator including first and second capacitances, the first capacitance being greater than the second capacitance, by the steps including: partially discharging the first capacitance in a first phase of biphasic waveform; and discharging the second capacitance to complete the first phase of a biphasic waveform.
Claim 3
Dependent Claim
30 words
The method of claim 1 further comprising the steps of: reversing polarity of the first capacitance and the second capacitance; and discharging the first capacitance and second capacitance in series.
References Cited (Backward Citations)
US5199429A
Cited
US5411525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-04-04 | 2003-10-04 | 2004-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-04 | 2007-10-04 | 2008-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-04 | 2011-10-04 | 2012-04-04 | $7700.00 | Window Closed / Lapsed |