US3085566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring the electrical response of living tissue
Assignee: Cutler Hammer Inc
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Filing: 1959-09-18
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Granted: 1963-04-16
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Expires: 1979-09-18
Abstract
No abstract record available.
Inventors
- 👤 Walter E Tolles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:04
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/05; A61B5/053; A61B5/0535
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
APPARATUS FOR MEASURING ELECTRICAL CHARACTERISTICS, INCLUDING A COMPONENT OF TISSUE IMPEDANCE, OF BIOLOGICAL TISSUE DISPOSED BETWEEN A PAIR OF CONTACTING ELECTRODES WHICH COMPRISES AN ALTERNATING CURRENT SUPPLY A.-C. COUPLED TO SAID ELECTRODES, SAID SUPPLY HAVING AN IMPEDNANCE WHICH IS HIGH COMPARED TO THE IMPEDANCE OF THE TISSUE TO BE MEASURED SO AS TO PASS A SUBSTANTIALLY CONSTANT AMPLITUDE ALTERNATING CURRENT THERETHROUGH WHICH IS SUBSTANTIALLY UNAFFECTED BY CHANGES IN TISSUE IMPEDANCE, SAID CURRENT BEING BELOW THE LEVEL OF TISSUE RESPONSE THERETO, AN AMPLIFIER FOR AMPLIFYING THE ALTERNATING VOLTAGE DEVELOPED BETWEEN SAID ELECTRODES, SAID AMPLIFIER HAVING AN INPUT IMPEDANCE WHICH IS HIGH COMPARED TO THE IMPEDANCE OF THE TISSUE TO BE MEASURED, AND MEANS FOR MEASURING THE AMPLITUDE OF SAID AMPLIFIED ALTERNATING VOLTAGE TO OBTAIN A MEASUREMENT OF A COMPONENT OF TISSUE IMPEDANCE.
Claim 2
Dependent Claim
131 words
APPARATUS FOR MEASURING ELECTRICAL CHARACTERISTICS, INCLUDING A COMPONENT OF TISSUE IMPEDANCE, OF BIOLOGICAL TISSUE DISPOSED BETWEEN A PAIR OF CONTACTING ELECTRODES WHICH COMPRISES AN ALTERNATING CURRENT SUPPLY A.-C. COUPLED TO SAID ELECTRODES, SAID SUPPLY HAVING AN IMPEDNANCE WHICH IS HIGH COMPARED TO THE IMPEDANCE OF THE TISSUE TO BE MEASURED SO AS TO PASS A SUBSTANTIALLY CONSTANT AMPLITUDE ALTERNATING CURRENT THERETHROUGH WHICH IS SUBSTANTIALLY UNAFFECTED BY CHANGES IN TISSUE IMPEDANCE, SAID CURRENT BEING BELOW THE LEVEL OF TISSUE RESPONSE THERETO, AN AMPLIFIER FOR AMPLIFYING THE ALTERNATING VOLTAGE DEVELOPED BETWEEN SAID ELECTRODES, SAID AMPLIFIER HAVING AN INPUT IMPEDANCE WHICH IS HIGH COMPARED TO THE IMPEDANCE OF THE TISSUE TO BE MEASURED, AND MEANS FOR MEASURING THE AMPLITUDE OF SAID AMPLIFIED ALTERNATING VOLTAGE TO OBTAIN A MEASUREMENT OF A COMPONENT OF TISSUE IMPEDANCE.
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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |