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US3579644A
Expired / Lapsed
US
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Artificial heart
Assignee: Individual
•
Filing: 1969-02-26
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Granted: 1971-05-25
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Expires: 1989-02-26
Abstract
Abstract THIS DISCLOSURE RELATES TO AN ARTIFICIAL HEART WHICH IS SO CONSTRUCTED WHEREBY IT MAY BE MOUNTED IN THE HUMAN BODY AND PERMANENTLY CONNECTED TO THE BLOOD VESSELS OF THAT BODY WITH THE HEART BEING POWERED BY AN EXTERNAL SOURCE. THE HEART MADES USE OF A LOW BOILING POINT LIQUID AND A HEATING COIL WHICH IS PERIODICALLY ACTUATED SO AS TO EFFECT BOILING OF THE LIQUID, FOLLOWED BY THE RAPID COOLING OF THE LIQUID TO CONDENSE THE SAME WHEREBY AN EXPANSION AND CONTRACTION FUNCTION IS PERFORMED AND CONSTANTLY REPEATED SO AS TO EFFECT A PUMPING ACTION.
Inventors
- 👤 William G Esmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:40
CPC Classifications
F; F04; F04F; F04F1/00; F04F1/02; F04F1/04; A; A61; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/196; A61M60/40; A61M60/424; A61M60/427; A61M60/80; A61M60/855; A61M60/871; A61M60/873; F04B; F04B43/00; F04B43/02; F04B43/025; F04B43/026; F04B43/06; A61M2205/00; A61M2205/82; A61M2205/8237; A61M2205/8243; A61M60/126; A61M60/148; A61M60/20; A61M60/247; A61M60/253; A61M60/268
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |