Patent EP0425783A1 successfully refreshed from Google Patents.
US6165215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing heart valves
Assignee: H D S Systems Ltd
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Filing: 1996-07-08
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Granted: 2000-12-26
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Expires: 2016-07-08
Abstract
Abstract A method for producing valves for blood flow control having an outer sleeve and a plurality of flexible leaflets fixed to an inner surface of the sleeve, including: molding the valve to a first shape, in which the valve leaflets are in a closed position; holding the valve in a second desired shape, in which the valves are in an open position; and immersing the valve in a hot liquid while holding it in the second shape.
Inventors
- 👤 Dan Rottenberg
- 👤 Ehad Sondak
- 👤 Dudu Haimovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:43
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2/2415; A61M; A61M60/00; A61M60/10; A61M60/104; A61M60/109; A61M60/113; A61M60/80; A61M60/845; A61M60/851; A61M60/855; A61M60/89; A61M60/894; A61M60/896; Y; Y10; Y10S; Y10S623/00; Y10S623/909; Y10S623/91
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
77 words
A method for producing valves for blood flow control having an outer sleeve and a plurality of flexible leaflets fixed to an inner surface of the sleeve, compnrsing: molding the valve to a first shape in which the valve leaflets are in a closed position; holding the valve in a second desired shape, in which the valves are in an open position; and immersing the valve in a hot liquid while holding it in the second shape.
Claim 2
Independent Claim
77 words
A method for producing valves for blood flow control having an outer sleeve and a plurality of flexible leaflets fixed to an inner surface of the sleeve, compnrsing: molding the valve to a first shape in which the valve leaflets are in a closed position; holding the valve in a second desired shape, in which the valves are in an open position; and immersing the valve in a hot liquid while holding it in the second shape.
Claim 3
Dependent Claim
21 words
A method according to claim 1 wherein holding the leaflets in an open position comprises inserting a mandrill into the valve.
Claim 4
Dependent Claim
22 words
A method according to claim 1 wherein immersing the valve in a bath of hot liquid increases the flexibility of the leaflets.
Claim 5
Dependent Claim
24 words
A method according to claim 1 wherein immersing the valve in the bath of hot liquid sets the valve in the second, desired shape.
Claim 6
Dependent Claim
18 words
A method according to claim 1 wherein molding the valve comprises integrally molding the sleeve and the leaflets.
Claim 7
Dependent Claim
25 words
A method according to claim 5 wherein integrally molding the sleeve and the leaflets comprises injecting a polymer material into a mold at high pressure.
Claim 8
Dependent Claim
24 words
A method according to claim 6 wherein injecting the molding under high pressure comprises injecting the polymer at a pressure greater than 2800 atm.
Claim 9
Dependent Claim
24 words
A method according to claim 6 wherein injecting the molding under high pressure comprises injecting the polymer at a pressure greater than 3500 atm.
Claim 10
Dependent Claim
21 words
A method according to claim 1 wherein immersing the valve in a hot liquid comprises immersing the valve in hot water.
Claim 11
Dependent Claim
27 words
A method according to claim 1 wherein immersing the valve in a hot liquid comprises immersing the valve in liquid at a temperature greater than 60° C.
Claim 12
Dependent Claim
27 words
A method according to claim 1 wherein immersing the valve in a hot liquid comprises immersing the valve in liquid at a temperature greater than 80° C.
Claim 13
Dependent Claim
30 words
A method according to claim 1 wherein immersing the valve in a hot liquid comprises immersing the valve in liquid at a temperature substantially in the range of 82-84° C.
Claim 14
Dependent Claim
22 words
A method in accordance with claim 1 wherein immersing the valve comprises immersing the valve in a liquid for approximately two minutes.
Claim 15
Dependent Claim
20 words
A method according to claim 1 and comprising immersing the valve in cold liquid after said immersion in hot liquid.
Claim 16
Dependent Claim
13 words
A method according to claim 14 wherein the cold liquid is cold water.
Claim 17
Dependent Claim
20 words
A method according to claim 14 wherein the cold liquid has a temperature substantially in the range of 68-77° C.
Claim 18
Dependent Claim
23 words
A method according to claim 14 wherein said leaflet valves are held in said second. desired shape during said immersion in cold liquid.
Claim 19
Dependent Claim
28 words
A method according to claim 14 and comprising immersing the valve a second time in hot liquid followed by immersing the valve a second time in cold liquid.
Claim 20
Dependent Claim
22 words
A method according to claim 1 wherein immersing the valve in a liquid comprises immersing the valve in a bath of liquid.
Claim 21
Independent Claim
81 words
A method for producing valves for blood flow control having an outer sleeve and a plurality of flexible leaflets fixed to an inner surface of the sleeve, comprising: molding the valve to a first shape, by injecting a polymer material into a mold at high pressure; holding the valve in a second desired shape; and immersing the valve in a hot liquid while holding it in the second shape, wherein molding the valve comprises integrally molding the sleeve and the leaflets.
Claim 22
Independent Claim
81 words
A method for producing valves for blood flow control having an outer sleeve and a plurality of flexible leaflets fixed to an inner surface of the sleeve, comprising: molding the valve to a first shape, by injecting a polymer material into a mold at high pressure; holding the valve in a second desired shape; and immersing the valve in a hot liquid while holding it in the second shape, wherein molding the valve comprises integrally molding the sleeve and the leaflets.
Claim 23
Independent Claim
65 words
A method for producing valves for blood flow control having an outer sleeve and a plurality of flexible leaflets fixed to an inner surface of the sleeve, comprising: molding the valve to a first shape; holding the valve in a second desired shape; and immersing the valve in hot liquid at a temperature of greater than 60° C., while holding it in the second shape.
Claim 24
Independent Claim
65 words
A method for producing valves for blood flow control having an outer sleeve and a plurality of flexible leaflets fixed to an inner surface of the sleeve, comprising: molding the valve to a first shape; holding the valve in a second desired shape; and immersing the valve in hot liquid at a temperature of greater than 60° C., while holding it in the second shape.
Claim 25
Dependent Claim
14 words
A method according to claim 21 wherein the temperature is greater than 80° C.
Claim 26
Dependent Claim
17 words
A method according to claim 21 wherein the temperature is substantially in the range of 82-84° C.
Claim 27
Independent Claim
83 words
A method for producing valves for blood flow control having an outer sleeve and a plurality of flexible leaflets fixed to an inner surface of the sleeve, comprising: (a) molding the valve to a first shape; (b) holding the valve in a second desired shape; (c) immersing the valve in a hot liquid while holding it in the second shape (d) immersing the valve in a cold liquid after immersion of the valve in a hot liquid; and (e) repeating (c) and (d).
Claim 28
Independent Claim
83 words
A method for producing valves for blood flow control having an outer sleeve and a plurality of flexible leaflets fixed to an inner surface of the sleeve, comprising: (a) molding the valve to a first shape; (b) holding the valve in a second desired shape; (c) immersing the valve in a hot liquid while holding it in the second shape (d) immersing the valve in a cold liquid after immersion of the valve in a hot liquid; and (e) repeating (c) and (d).
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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) | 2003-12-26 | 2004-06-26 | 2004-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-26 | 2008-06-26 | 2008-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-26 | 2012-06-26 | 2012-12-26 | $7700.00 | Window Closed / Lapsed |