US4731075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bicuspate cardiac-valve prosthesis
Assignee: Individual
•
Filing: 1985-12-17
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Granted: 1988-03-15
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Expires: 2005-12-17
Abstract
Abstract A biscuspate cardiac valve prosthesis for use in human clinical medicine as a mitral valve graft. The valve has a support ring with an arched crosspiece containing apertures or a single longitudinal aperture along its length, joined at its ends to the lower portion of the support ring. Valve flaps are attached to both sides of the crosspiece, the opposite edges of the flaps being able to move freely during functioning of the valve. When the valve is closed, the flaps abut the inner surface of the support ring in a low dome profile.
Inventors
- 👤 Jose I. Gallo Mezo
- 👤 Manuel Carrion Alvarez
- 👤 Blanca Ruiz
- 👤 Carlos Gomez Duran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:53
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2403
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
A bicuspate cardiac-valve prosthesis for use in human clinical medicine as a mitral valve graft, comprising a support ring having an arched central or diametral crosspiece joined at its ends to the lower portion of said support ring, said central crosspiece being double edged, to both sides of which central crosspiece the inner edges of respective valve flaps are attached, while their opposite edges move freely during function of the apparatus and, when the valve is closed, abut against the inner surface of the support ring in a low, domed profile, and wherein the central crosspiece contains a series of apertures along its length to permit passage of a certain quantity of blood to prevent the formation of clots.
Claim 2
Dependent Claim
119 words
A bicuspate cardiac-valve prosthesis for use in human clinical medicine as a mitral valve graft, comprising a support ring having an arched central or diametral crosspiece joined at its ends to the lower portion of said support ring, said central crosspiece being double edged, to both sides of which central crosspiece the inner edges of respective valve flaps are attached, while their opposite edges move freely during function of the apparatus and, when the valve is closed, abut against the inner surface of the support ring in a low, domed profile, and wherein the central crosspiece contains a series of apertures along its length to permit passage of a certain quantity of blood to prevent the formation of clots.
Claim 3
Dependent Claim
19 words
A prosthesis according to claim 1, wherein the apertures of the central crosspiece form a continuous longitudinal central aperture.
Claim 4
Dependent Claim
16 words
A prosthesis according to claim 1, wherein the valve flaps are sewn to the central crosspiece.
Claim 5
Dependent Claim
15 words
A prosthesis as in claim 1, wherein said crosspiece is integral to said support ring.
Claim 6
Dependent Claim
17 words
A prosthesis according to claim 2, wherein the longitudinal aperture is enlarged or widened at its ends.
Claim 7
Dependent Claim
15 words
A prosthesis as in claim 2, wherein said crosspiece is integral to said support ring.
Claim 8
Dependent Claim
23 words
A prosthesis as in claim 4, wherein said flaps are constructed from polyurethane, and the passages of said apertures are lined with polyurethane.
Claim 9
Dependent Claim
23 words
A prosthesis as in claim 6, wherein said flaps are constructed from polyurethane, and the passages of said apertures are lined with polyurethane.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |