US3131689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for testing blood-flow conditions
Assignee: FRITZ SCHWARZER GmbH
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Filing: 1960-01-18
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Granted: 1964-05-05
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Expires: 1980-01-18
Abstract
No abstract record available.
Inventors
- 👤 Rodler Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:39
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/026; A61B5/0295
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
APPARATUS FOR TESTING BLOOD-FLOW CONDITIONS IN AN ANIMAL BODY, COMPRISING A PRIMARY EXCITATION CIRCUIT HAVING TWO MAIN ELECTRODES ADAPTED FOR CONTACTING THE ANIMAL BODY AT LOCALITIES WITH A SPACE BETWEEN THEM AND HAVING A VOLTAGE SOURCE CONNECTED WITH SAID MAIN ELECTRODES FOR IMPRESSING A VOLTAGE UPON THE ANIMAL BODY BETWEEN SAID MAIN ELECTRODES, ELECTRICAL MEANS FOR SENSING THE EFFECT OF BLOOD FLOW UPON THE BODY CONDUCTANCE INTERMEDIATE SAID MAIN ELECTRODES, SAID ELECTRICAL MEANS INCLUDING A PLURALITY OF MUTUALLY INSULATED PROBE ELECTRODES CONTACTABLE WITH THE ANIMAL BODY BETWEEN SAID MAIN ELECTRODES AND SIMULTANEOUSLY WITH SAID ELECTRODES FOR TAPPING RESPECTIVE VOLTAGE DROPS OFF THE ANIMAL BODY, RESPECTIVE SECONDARY CIRCUITS ISOLATED FROM SAID PRIMARY EXCITATION CIRCUIT AND CONNECTED TO PAIRS OF SAID PROBE ELECTRODES, AND VOLTAGE MEASURING MEANS CONNECTED TO SAID SECONDARY CIRCUITS FOR SIMULTANEOUSLY MEASURING SAID RESPECTIVE VOLTAGE DROPS AT SAID PROBE ELECTRODES.
Claim 2
Dependent Claim
141 words
APPARATUS FOR TESTING BLOOD-FLOW CONDITIONS IN AN ANIMAL BODY, COMPRISING A PRIMARY EXCITATION CIRCUIT HAVING TWO MAIN ELECTRODES ADAPTED FOR CONTACTING THE ANIMAL BODY AT LOCALITIES WITH A SPACE BETWEEN THEM AND HAVING A VOLTAGE SOURCE CONNECTED WITH SAID MAIN ELECTRODES FOR IMPRESSING A VOLTAGE UPON THE ANIMAL BODY BETWEEN SAID MAIN ELECTRODES, ELECTRICAL MEANS FOR SENSING THE EFFECT OF BLOOD FLOW UPON THE BODY CONDUCTANCE INTERMEDIATE SAID MAIN ELECTRODES, SAID ELECTRICAL MEANS INCLUDING A PLURALITY OF MUTUALLY INSULATED PROBE ELECTRODES CONTACTABLE WITH THE ANIMAL BODY BETWEEN SAID MAIN ELECTRODES AND SIMULTANEOUSLY WITH SAID ELECTRODES FOR TAPPING RESPECTIVE VOLTAGE DROPS OFF THE ANIMAL BODY, RESPECTIVE SECONDARY CIRCUITS ISOLATED FROM SAID PRIMARY EXCITATION CIRCUIT AND CONNECTED TO PAIRS OF SAID PROBE ELECTRODES, AND VOLTAGE MEASURING MEANS CONNECTED TO SAID SECONDARY CIRCUITS FOR SIMULTANEOUSLY MEASURING SAID RESPECTIVE VOLTAGE DROPS AT SAID PROBE ELECTRODES.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |