US3911502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite heart valve poppet
Assignee: United States Department of Health and Human Services
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Filing: 1974-08-23
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Granted: 1975-10-14
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Expires: 1994-08-23
Abstract
Abstract A composite heart valve poppet for use in ball-in-cage type artificial heart valves is disclosed. The poppet includes a core of a rigid material such as polypropylene, covered by a jacket of an elastomer such as segmented polyether polyurethane. The heart valve poppet of the present invention provides improved operating performance, physiological acceptability, length of service and reliability compared to previously known poppets.
Inventors
- 👤 John W Boretos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:13
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2421; A61F2/2424; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A COMPOSITE HEART VALVE POPPET FOR USE IN BALL-IN-CAGE TYPE ARTIFICIAL HEART VALVES, COMPRISING: A BALL-SHAPED CORE OF A RIGID MATERIAL, SAID CORE HAVING APPLIED THERETO A LAYER OF PHYSIOLOGICALLY INERT ELASTOMERIC MATERIAL, SAID LAYER HAVING A THICKNESS OF FROM 0.5 TO 3.0 MM, SAID CORE MATERIAL BEING POLYPROPYLENE HAVING A SPECIFIC GRAVITY OF 0.9, AND SAID ELASTO-
Claim 2
Dependent Claim
58 words
A COMPOSITE HEART VALVE POPPET FOR USE IN BALL-IN-CAGE TYPE ARTIFICIAL HEART VALVES, COMPRISING: A BALL-SHAPED CORE OF A RIGID MATERIAL, SAID CORE HAVING APPLIED THERETO A LAYER OF PHYSIOLOGICALLY INERT ELASTOMERIC MATERIAL, SAID LAYER HAVING A THICKNESS OF FROM 0.5 TO 3.0 MM, SAID CORE MATERIAL BEING POLYPROPYLENE HAVING A SPECIFIC GRAVITY OF 0.9, AND SAID ELASTO-
References Cited (Backward Citations)
US3579645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |