US3722004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc for heart valves
Assignee: Baxter International Inc
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Filing: 1971-12-08
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Granted: 1973-03-27
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Expires: 1991-12-08
Abstract
Abstract A heart valve occluder includes a ring of hard, wear-resistant material such as isotropic, pyrolytic carbon embedded in a plastic matrix with the outer circumference of the ring protruding from the plastic about the entire circumference of the occluder. By this arrangement, the wear rate on the edge of the occluder is improved, while the noise of the occluder striking the struts of its cage is reduced.
Inventors
- 👤 H Cromie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:44
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2421; A61F2/2424; A61F2/2409; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7914
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
30 words
The heart valve occluder member of claim 1 in which said ring defines a central aperture, and a plurality of smaller apertures which are radially spaced from said central aperture.
Claim 2
Dependent Claim
24 words
The heart valve occluder member of claim 2 which is a disc, wherein said ring protrudes about the entire outer circumference of said disc.
Claim 3
Dependent Claim
15 words
The heart valve disc of claim 3 in which said ring comprises isotropic, pyrolytic carbon.
Claim 4
Dependent Claim
28 words
The heart valve disc of claim 4 in which said plastic matrix is selected from the group consisting of ultra high molecular weight polyethylene, polypropylene, or polycarbonate resin.
Claim 5
Dependent Claim
107 words
In a heart valve, an occluder member which comprises a flat member of hard, wear-resistant material embedded in a plastic matrix softer than said hard wear-resistant material with the outer circumference of said flat member protruding from said plastic about the entire outer periphery of said occluder member along a line of sliding contact of said occluder member with a remaining portion of said heart valve as said occluder member opens and closes, said hard material and plastic being physiologically suitable for implanation in a living body, whereby said outer circumference of the flat member provides a wear-resistant sliding contact with the remainder of said heart valve.
Claim 6
Dependent Claim
14 words
The heart valve of claim 6 in which said flat member is a ring.
Claim 7
Dependent Claim
29 words
The heart valve of claim 7 in which said occluder member is a disc, wherein said ring protrudes from said plastic about the entire outer circumference of said disc.
Claim 8
Dependent Claim
37 words
The heart valve of claim 8 in which the flat member ring of hard, wear-resistant material within said disc defines a central aperture and a plurality of smaller apertures which are radially spaced from the central aperture.
Claim 9
Dependent Claim
14 words
The heart valve of claim 9 in which said ring comprises isotropic, pyrolytic carbon.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |