Patent US3396409A successfully refreshed from Google Patents.
US3396409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial heart valve
Assignee: National Research Development Corp UK
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Filing: 1965-12-09
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Granted: 1968-08-13
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Expires: 1985-12-09
Abstract
No abstract record available.
Inventors
- 👤 Melrose Denis Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:56
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2403; A61F2/2406; A61F2/2409; A61F2/2421; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A ONE-WAY FLUID CONTROL VALVE ADAPTED FOR ACTUATION BY A REVERSAL OF FLUID WHICH COMPRISES, A LENTICULARSHAPED VALVE CLOSURE MEMBER HAVING AT LEAST TWO WELLTAPERING GUIDE MEMBERS PROJECTING OUTWARDLY FROM ONE OF ITS FACES, AT LEAST ONE GUIDE MEMBER PROJECTING FURTHER THAN ANOTHER, AND A RING-MEMBER WHICH SURROUNDS AT LEAST PART OF SAID GUIDE MEMBERS THE SURFACE OF THE RING-MEMBER ADJACENT SAID ONE FACE OF THE CLOSURE MEMBER BEING ADAPTED FOR ENGAGEMENT WITH A SEATING PORTION OF SAID FACE SO AS, IN OPERATION, TO EFFECT CLOSURE OF THE VALVE, SAID GUIDE MEMBERS BEING SO SHAPED AS TO PROVIDE BY ABUTMENT WITH SAID RING-MEMBER LIMITATION OF MOVEMENT OF SAID CLOSURE MEMBER AWAY FROM SAID SETTING PORTION OF SAID RING-MEMBER.
Claim 2
Dependent Claim
118 words
A ONE-WAY FLUID CONTROL VALVE ADAPTED FOR ACTUATION BY A REVERSAL OF FLUID WHICH COMPRISES, A LENTICULARSHAPED VALVE CLOSURE MEMBER HAVING AT LEAST TWO WELLTAPERING GUIDE MEMBERS PROJECTING OUTWARDLY FROM ONE OF ITS FACES, AT LEAST ONE GUIDE MEMBER PROJECTING FURTHER THAN ANOTHER, AND A RING-MEMBER WHICH SURROUNDS AT LEAST PART OF SAID GUIDE MEMBERS THE SURFACE OF THE RING-MEMBER ADJACENT SAID ONE FACE OF THE CLOSURE MEMBER BEING ADAPTED FOR ENGAGEMENT WITH A SEATING PORTION OF SAID FACE SO AS, IN OPERATION, TO EFFECT CLOSURE OF THE VALVE, SAID GUIDE MEMBERS BEING SO SHAPED AS TO PROVIDE BY ABUTMENT WITH SAID RING-MEMBER LIMITATION OF MOVEMENT OF SAID CLOSURE MEMBER AWAY FROM SAID SETTING PORTION OF SAID RING-MEMBER.
References Cited (Backward Citations)
US2564023A
Cited
US3294116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |