US3315681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and techniques useful for changing temperature of fluids, particularly blood
Assignee: Individual
•
Filing: 1964-08-17
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Granted: 1967-04-25
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Expires: 1984-08-17
Abstract
No abstract record available.
Inventors
- 👤 Heinz F Poppendiek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:41
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/44; A61M19/00; F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/106; A61M2205/00; A61M2205/36; A61M2205/3653; Y; Y10; Y10S; Y10S159/00; Y10S159/01
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
A LIQUID HEATER SYSTEM COMPRISING: A LONGITUDINAL CHAMBER HAVING AN INLET AND AN OUTLET WHEREBY AN ELECTROLYTIC LIQUID MAY FLOW THROUGH SAID CHAMBER; A PAIR OF SPACED-APART ELECTRODES ADAPTED TO BE CONNECTED TO A SOURCE OF A.C. POTENTIAL; SAID ELECTRODES BEING POSITIONED IN SAID CHAMBER SO THAT LIQUID FLOWING BETWEEN SAID ELECTRODES MAY BE HEATED BY THE CURRENT RESULTING FROM A POTENTIAL APPLIED TO SAID ELECTRODES; AND A SOURCE OF ALTERNATING CURRENT OF AUDIO FREQUENCY GREATER THAN 200 CYCLES PER SECOND CONNECTED TO SAID ELECTRODES.
Claim 2
Dependent Claim
85 words
A LIQUID HEATER SYSTEM COMPRISING: A LONGITUDINAL CHAMBER HAVING AN INLET AND AN OUTLET WHEREBY AN ELECTROLYTIC LIQUID MAY FLOW THROUGH SAID CHAMBER; A PAIR OF SPACED-APART ELECTRODES ADAPTED TO BE CONNECTED TO A SOURCE OF A.C. POTENTIAL; SAID ELECTRODES BEING POSITIONED IN SAID CHAMBER SO THAT LIQUID FLOWING BETWEEN SAID ELECTRODES MAY BE HEATED BY THE CURRENT RESULTING FROM A POTENTIAL APPLIED TO SAID ELECTRODES; AND A SOURCE OF ALTERNATING CURRENT OF AUDIO FREQUENCY GREATER THAN 200 CYCLES PER SECOND CONNECTED TO SAID ELECTRODES.
Claim 3
Independent Claim
33 words
A METHOD OF HEATING BLOOD WHICH COMPRISES: CIRCULATING BLOOD THROUGH A CHAMBER BETWEEN SPACED ELECTRODES; AND APPLYING AN AUDIO A.C. POTENTIAL HAVING A FREQUENCY GREATER THAN 200 CYCLES PER SECOND ACROSS SAID ELECTRODES.
Claim 4
Independent Claim
33 words
A METHOD OF HEATING BLOOD WHICH COMPRISES: CIRCULATING BLOOD THROUGH A CHAMBER BETWEEN SPACED ELECTRODES; AND APPLYING AN AUDIO A.C. POTENTIAL HAVING A FREQUENCY GREATER THAN 200 CYCLES PER SECOND ACROSS SAID 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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |