Patent US4957503A successfully refreshed from Google Patents.
US4957503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heart valve prosthesis
Assignee: Individual
•
Filing: 1988-06-23
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Granted: 1990-09-18
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Expires: 2008-06-23
Abstract
Abstract A heart valve prosthesis has a valve ring (1) having an opening (2) for the flow of blood. A valve poppet (3) is mounted in the opening (2) for closing and opening it. An annular curvilinear depression (9) is provided on an upper or distal side (6) of the poppet (3) for reducing the poppet mass. The poppet (4) is floatingly mounted between support structures (4, 5).
Inventors
- 👤 Alexandr S. Bukatov
- 👤 Naum A. Iofis
- 👤 Jury G. Egorov
- 👤 Natalya B. Dobrova
- 👤 Anatoly S. Kostretsov
- 👤 Andrei V. Agafonov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:03
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2403; A61F2/2406
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
132 words
A heart valve prosthesis comprising: (a) a valve ring (1) having an opening (2) for the passage of blood, and suport structures (4,5); and (b) a valve poppet (3) floatingly mounted in the opening (2) and having a distal side (6) and a proximal side (7) engageable by the support structures (4,5) respectively, to thereby limit the motion of the poppet (3), said distal side (6) and proximal side (7) having a concave shape with a radius of curvature whose centers are on opposed sides of the valve, wherein a periphery of said distal side (6) and a periphery of said proximal side (7) form a smoothly surfaced edge along the entire circumference of the poppet (3) and said concave distal and proximal sides diverge inwardly away from said smoothly surfaced edge.
Claim 2
Dependent Claim
132 words
A heart valve prosthesis comprising: (a) a valve ring (1) having an opening (2) for the passage of blood, and suport structures (4,5); and (b) a valve poppet (3) floatingly mounted in the opening (2) and having a distal side (6) and a proximal side (7) engageable by the support structures (4,5) respectively, to thereby limit the motion of the poppet (3), said distal side (6) and proximal side (7) having a concave shape with a radius of curvature whose centers are on opposed sides of the valve, wherein a periphery of said distal side (6) and a periphery of said proximal side (7) form a smoothly surfaced edge along the entire circumference of the poppet (3) and said concave distal and proximal sides diverge inwardly away from said smoothly surfaced edge.
Claim 3
Dependent Claim
25 words
A heart valve prosthesis according to claim 1 in which the distal side (6) and the proximal side (7) have the same radius of curvature.
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) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |