US6327772B1
Expired / Lapsed
US
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Method for fabricating a planar eversible lattice which forms a stent when everted
Assignee: Medtronic Vascular Inc
•
Filing: 1999-04-13
•
Granted: 2001-12-11
•
Expires: 2019-04-13
Abstract
Abstract Methods and articles for fabricating expansive stents having generally cylindrical configurations with a pattern therein include interconnecting portions from a generally planar sheet of material with a central portion. A pattern is formed in the sheet of material around said central portion corresponding to said pattern having interconnecting portions. The pattern has a generally circular outer margin. The pattern is separated from the sheet of material and causes relative movement between the central portion of the pattern and the outer circular margin in a direction perpendicular to the plane of the central portion. The pattern is transformed from one sheet form into one in cylindrical form to provide an expansible stent having a generally cylindrical configuration.
Inventors
- 👤 Gholam-Reza Zadno-Azizi
- 👤 Kirsten F. Luehrs
- 👤 Darin C. Gittings
- 👤 Roman Turovskiy
- 👤 Brian J. Cox
- 👤 Brian Shiu
- 👤 Michael B. Hayes
- 👤 Craig J. Coombs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:29
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/88; A61F2/90; A61F2/91; A61F2/915; B; B21; B21D; B21D51/00; B21D51/02; B21D51/10; A61F2002/91533; A61F2002/9155; A61F2002/91558; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2230/0028; A61F2230/005; A61F2230/0054; A61F2230/0063; A61F2230/0067; A61F2240/00; A61F2240/001; Y; Y10; Y10S; Y10S623/00; Y10S623/901; Y10T; Y10T29/00; Y10T29/18; Y10T29/49; Y10T29/49789; Y10T29/49799; Y10T29/49995
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
49 words
A method for fabricating a planar eversible lattice which when everted forms a cylindrical wall of a cylindrical stent, said method comprising: patterning a planar sheet of material to form an annular lattice of interconnected elements defining the eversible structure, wherein the eversible structure becomes radially expansible after eversion.
Claim 2
Independent Claim
49 words
A method for fabricating a planar eversible lattice which when everted forms a cylindrical wall of a cylindrical stent, said method comprising: patterning a planar sheet of material to form an annular lattice of interconnected elements defining the eversible structure, wherein the eversible structure becomes radially expansible after eversion.
Claim 3
Dependent Claim
25 words
A method as in claim 1 , wherein the interconnected elements of the planar annular lattice are joined in at least one continuous annular path.
Claim 4
Dependent Claim
16 words
A method as in claim 2 , wherein the interconnected elements comprise an annular serpentine ring.
Claim 5
Dependent Claim
24 words
A method as in claim 1 , wherein the eversible lattice is an annular serpentine ring which becomes a cylindrical serpentine ring after eversion.
Claim 6
Dependent Claim
18 words
A method as in claim 1 , wherein the interconnected elements comprise a plurality of closed peripheral structures.
Claim 7
Dependent Claim
14 words
A method as in claim 1 , wherein the closed peripheral structures are polygonal.
Claim 8
Dependent Claim
13 words
A method as in claim 6 , wherein the polygonal structures are lozenge-shaped.
Claim 9
Dependent Claim
36 words
A method as in claim 7 , wherein the eversible lattice comprises a plurality of lozenge-shaped elements having axes which are aligned radially within the annular lattice, wherein adjacent lozenge-shaped elements are connected to each other.
Claim 10
Dependent Claim
29 words
A method as in claim 8 , wherein the adjacent lozenge-shaped elements are connected to each other by tabs located along a common diametric line within the annular lattice.
Claim 11
Dependent Claim
22 words
A method as in claim 9 , wherein the eversible lattice comprises at least two radially successive annular rows of lozenge-shaped elements.
Claim 12
Dependent Claim
20 words
A method as in claim 1 , wherein the patterning step comprises photochemical etching of the planar sheet of material.
Claim 13
Dependent Claim
17 words
A method as in claim 1 , wherein the patterning step comprises cutting the sheet of material.
Claim 14
Dependent Claim
15 words
A method as in claim 12 , wherein the cutting step comprises electrical discharge machining.
Claim 15
Dependent Claim
14 words
A method as in claim 12 , wherein the cutting step comprises laser cutting.
Claim 16
Dependent Claim
33 words
A method as in claim 12 , wherein the cutting step comprises providing a plurality of planar sheets arranged in a stack and cutting the stack to provide a plurality of planar networks.
Claim 17
Dependent Claim
18 words
A method as in claim 1 , wherein the patterning step comprises stamping the planar sheet of material.
Claim 18
Dependent Claim
20 words
A method as in claim 1 , wherein the planar annular lattice of interconnected elements is composed of a metal.
Claim 19
Dependent Claim
15 words
A method as in claim 17 , wherein the metal is a shape memory alloy.
Claim 20
Dependent Claim
15 words
A method as in claim 18 , wherein the metal is a nickel titanium alloy.
Claim 21
Dependent Claim
24 words
A method as in claim 19 , wherein the metal is selected from the group consisting of stainless steel, titanium, tantalum, platinum, and elgiloy.
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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) | 2004-12-10 | 2005-06-11 | 2005-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-10 | 2009-06-11 | 2009-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-10 | 2013-06-11 | 2013-12-11 | $7700.00 | Window Closed / Lapsed |