Patent US3553736A successfully refreshed from Google Patents.
US3553736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary ventricle
Assignee: United States Department of Health and Human Services
•
Filing: 1968-11-25
•
Granted: 1971-01-12
•
Expires: 1988-11-25
Abstract
Abstract AN ARTIFICIAL AUXILIARY VENTRICLE IS PROVIDED HAVING A GENERALLY SPHERICAL SHAPE AND AN INTERNAL CONFIGURATION TO DIRECT OR REGULATE THE FLOW OF BLOOD. THE UNIT IS IMPLANTED IN THE ASCENDING AORTA DURING SHORT-TERM INFLOW AND OUTFLOW OCCULSION OF THE HEART AFTER WHICH THE CIRCULATION IS REESTABLISHED AND THE ANASTOMOSIS COMPLETED, OR BY DIRECT AND THROUGH SIDE ANASTOMOSIS WITHOUT INTERRUPTING THE CIRCULATION. THE DEVICE IS DRIVEN BY COMPRESSED AIR FROM AN OUTSIDE TANK VIA AN AIR TUBE AND IS CONTROLLED BY A SOLENOID VALVE WHICH IS TRIGGERED BY THE ECG OR THE LEFT VENTRICULAR PRESSURE CURVE.
Inventors
- 👤 Adrian Kantrowitz
- 👤 Steinar Tjonneland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:46
CPC Classifications
A; A61; A61M; A61M60/00; A61M60/20; A61M60/247; A61M60/253; A61M60/268; A61M60/274; A61M60/10; A61M60/122; A61M60/126; A61M60/152; A61M60/40; A61M60/424; A61M60/427; A61M60/50; A61M60/508; A61M60/515; A61M60/538; A61M60/554; A61M60/80; A61M60/835; A61M60/837; A61M60/855; A61M60/861; A61M60/148; A61M60/89; A61M60/894
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |