US3316896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and methods for the measure of the electrical impedance of living organisms
Assignee: Individual
•
Filing: 1963-10-15
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Granted: 1967-05-02
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Expires: 1983-10-15
Abstract
No abstract record available.
Inventors
- 👤 Thomasset Auguste Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:52
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/48; A61B5/4869; A61B5/05; A61B5/053; A61B5/0535; A61B5/0537
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A METHOD FOR SIMULTANEOUSLY AND ASSOCIATIVELY DETERMING THE INDIVIDUAL IMPEDANCES R1, AND R2 OF THE EXTRACELLULAR CONTENTS AND OF THE INTRACELLULAR CONTENTS OF A LIVING ORGANISM WHICH CONSISTS IN MEASURING THE TOTAL IMPEDANCE Z1 OF THE SAID ORGANISM BETWEEN TWO SELECTED POINTS THEREOF AT A FIRST FREQUENCY OF ABOUT 1000 CYCLES, FOR WHICH THE INFLUENCE OF ELECTROLYTIC PHENOMENA IS AVOIDED WHILE THE CAPACITIVE CURRENT PASSING THROUGH THE MEMBRANES OF THE CELLS IS OF NEGLIGIBLE VALUE WITH RESPECT TO THE CURRENT WHICH PASSES THROUGH THE EXTRACELLULAR CONTENTS, IN SUCH MANNER THAT Z1 IS SUBSTANTIALLY EQUAL TO THE VALUE OF THE INDIVIDUAL IMPEDANCE R1 OF THE EXTRACELLULAR CONTENTS; IN MEASURING THE TOTAL IMPEDANCE Z2 OF THE SAID ORGANISM BETWEEN THE SAID POINTS AT A SECOND FREQUENCY OF ABOUT 100 TO 500 KILOCYCLES TO REDUCE THE CAPACITIVE IMPEDANCE OF THE MEMBRANES OF THE CELLS TO A NEGLIGIBLE VALUE WITH RESPECT TO THE IMPEDANCE OF THE INTRACELLULARR CONTENTS IN SUCH MANNER THAT Z2 IS SUBSTANTIALLY THE RESULTANT OF THE INDIVIDUAL IMPEDANCES R1 OF THE EXTRACELLULAR CONTENTS AND R2 OF THE INTRACELLULAR CONTENTS WHEN CONNECTED IN PARALLEL; AND IN CALCULATING R2 FROM THE FORMULA
Claim 2
Independent Claim
189 words
A METHOD FOR SIMULTANEOUSLY AND ASSOCIATIVELY DETERMING THE INDIVIDUAL IMPEDANCES R1, AND R2 OF THE EXTRACELLULAR CONTENTS AND OF THE INTRACELLULAR CONTENTS OF A LIVING ORGANISM WHICH CONSISTS IN MEASURING THE TOTAL IMPEDANCE Z1 OF THE SAID ORGANISM BETWEEN TWO SELECTED POINTS THEREOF AT A FIRST FREQUENCY OF ABOUT 1000 CYCLES, FOR WHICH THE INFLUENCE OF ELECTROLYTIC PHENOMENA IS AVOIDED WHILE THE CAPACITIVE CURRENT PASSING THROUGH THE MEMBRANES OF THE CELLS IS OF NEGLIGIBLE VALUE WITH RESPECT TO THE CURRENT WHICH PASSES THROUGH THE EXTRACELLULAR CONTENTS, IN SUCH MANNER THAT Z1 IS SUBSTANTIALLY EQUAL TO THE VALUE OF THE INDIVIDUAL IMPEDANCE R1 OF THE EXTRACELLULAR CONTENTS; IN MEASURING THE TOTAL IMPEDANCE Z2 OF THE SAID ORGANISM BETWEEN THE SAID POINTS AT A SECOND FREQUENCY OF ABOUT 100 TO 500 KILOCYCLES TO REDUCE THE CAPACITIVE IMPEDANCE OF THE MEMBRANES OF THE CELLS TO A NEGLIGIBLE VALUE WITH RESPECT TO THE IMPEDANCE OF THE INTRACELLULARR CONTENTS IN SUCH MANNER THAT Z2 IS SUBSTANTIALLY THE RESULTANT OF THE INDIVIDUAL IMPEDANCES R1 OF THE EXTRACELLULAR CONTENTS AND R2 OF THE INTRACELLULAR CONTENTS WHEN CONNECTED IN PARALLEL; AND IN CALCULATING R2 FROM THE FORMULA
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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |