Patent US3138151A successfully refreshed from Google Patents.
US3138151A
Expired / Lapsed
US
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Detector and alarm ventricular impulses
Assignee: Individual
•
Filing: 1962-06-11
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Granted: 1964-06-23
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Robert L Chapman
- 👤 John W Gofman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/024; A61B5/0245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN A HEART TACHYCARDIA DETECTOR: (A) A PAIR OF ELECTRODES ADAPTED TO BE APPLIED TO THE BODY; (B) AN ALARM DEVICE ADAPTED TO BE SET OFF WHEN A VENTRICULAR TACHYCARDIA SERIES OF PREDETERMINED DURATION IS RECEIVED BY THE SAID ELECTRODES; (C) AND ELECTRICAL CIRCUITRY CONNECTING THE SAID ELECTRODES AND THE SAID ALARM DEVICE, SAID CIRCUITRY COMPRISING IN COMBINATION, A SELECTOR FOR PERMITTING PASSAGE TO THE REST OF THE CIRCUITRY OF ONLY THE NEGATIVE PORTION OF THE TACHYCARDIA PULSES, AN AMPLIFIER FOR AMPLIFYING THE SAID NEGATIVE PORTIONS OF THE TACHYCARDIA PULSES, A CLIPPER CONNECTED TO THE SAID AMPLIFIER FOR LIMITING THE OUTPUT VOLTAGE OF THE SAID AMPLIFIER TO A PREDETERMINED MAXIMUM, AN INTEGRATOR CONNECTED TO THE CLIPPER FOR RECEIVING THE CLIPPED NEGATIVE PULSES FROM THE SAID CLIPPER AND A TIMER CONNECTED WITH THE SAID INTEGRATOR FOR DISCHARGING THE SAID INTEGRATOR WHEREBY TO RESET THE INTEGRATOR PERIODICALLY.
Claim 2
Dependent Claim
145 words
IN A HEART TACHYCARDIA DETECTOR: (A) A PAIR OF ELECTRODES ADAPTED TO BE APPLIED TO THE BODY; (B) AN ALARM DEVICE ADAPTED TO BE SET OFF WHEN A VENTRICULAR TACHYCARDIA SERIES OF PREDETERMINED DURATION IS RECEIVED BY THE SAID ELECTRODES; (C) AND ELECTRICAL CIRCUITRY CONNECTING THE SAID ELECTRODES AND THE SAID ALARM DEVICE, SAID CIRCUITRY COMPRISING IN COMBINATION, A SELECTOR FOR PERMITTING PASSAGE TO THE REST OF THE CIRCUITRY OF ONLY THE NEGATIVE PORTION OF THE TACHYCARDIA PULSES, AN AMPLIFIER FOR AMPLIFYING THE SAID NEGATIVE PORTIONS OF THE TACHYCARDIA PULSES, A CLIPPER CONNECTED TO THE SAID AMPLIFIER FOR LIMITING THE OUTPUT VOLTAGE OF THE SAID AMPLIFIER TO A PREDETERMINED MAXIMUM, AN INTEGRATOR CONNECTED TO THE CLIPPER FOR RECEIVING THE CLIPPED NEGATIVE PULSES FROM THE SAID CLIPPER AND A TIMER CONNECTED WITH THE SAID INTEGRATOR FOR DISCHARGING THE SAID INTEGRATOR WHEREBY TO RESET THE INTEGRATOR PERIODICALLY.
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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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |