Patent US5769884A successfully refreshed from Google Patents.
US5769884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled porosity endovascular implant
Assignee: Cordis Corp
•
Filing: 1996-06-27
•
Granted: 1998-06-23
•
Expires: 2016-06-27
Abstract
Abstract A covered stent for treating a stenotic region in a blood vessel. The stent covering has different porosities in different regions. In those regions, typically the ends, where tissue ingrowth and re-endothelialization are desired, the stent covering is more porous, and in those regions were it is desirable to inhibit such ingrowth, the stent covering is substantially non-porous.
Inventors
- 👤 Kenneth S. Solovay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:37
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/82; A61F2/86; A61F2/90; A61F2002/072; A61F2240/00; A61F2240/001; A61F2250/00; A61F2250/0014; A61F2250/0023; A61F2250/0058; A61F2250/0067
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
148 words
An endoprosthesis implant comprising: a) a stent having an expandable frame structure; b) a stent covering disposed on said stent, said stent covering having opposed ends, a first region of the stent covering comprising portions of the stent covering adjacent the opposed ends and a second region of the stent covering comprising a middle portion of the stent covering interposed between the first region portions; c) the first region having a plurality of pores extending between an inner surface and a spaced apart outer surface of the stent covering defining a first porosity, and the second region having a second porosity different than said first porosity, said second porosity being defined by said second region having fewer pores than said first region; and d) each pore in the first region having a pore diameter at the stent covering outer surface of from about 30 to about 120 micrometers.
Claim 2
Dependent Claim
148 words
An endoprosthesis implant comprising: a) a stent having an expandable frame structure; b) a stent covering disposed on said stent, said stent covering having opposed ends, a first region of the stent covering comprising portions of the stent covering adjacent the opposed ends and a second region of the stent covering comprising a middle portion of the stent covering interposed between the first region portions; c) the first region having a plurality of pores extending between an inner surface and a spaced apart outer surface of the stent covering defining a first porosity, and the second region having a second porosity different than said first porosity, said second porosity being defined by said second region having fewer pores than said first region; and d) each pore in the first region having a pore diameter at the stent covering outer surface of from about 30 to about 120 micrometers.
Claim 3
Dependent Claim
35 words
The endoprosthesis implant according to claim 1 wherein an average distance between adjacent pores in the first region being at least about 3 times an average pore diameter of the pores in the first region.
Claim 4
Dependent Claim
14 words
The endoprosthesis implant according to claim 1 wherein the stent covering is substantially cylindrical.
Claim 5
Dependent Claim
33 words
The endoprosthesis implant according to claim 1 wherein said second region has a plurality of pores each having a pore diameter at the stent covering outer surface that is smaller than 30 micrometers.
Claim 6
Dependent Claim
15 words
The endoprosthesis implant according to claim 1 wherein said second region has substantially no pores.
Claim 7
Dependent Claim
22 words
The endoprosthesis implant according to claim 1 wherein said second region is substantially impermeable to passage of body fluids under atmospheric pressure.
Claim 8
Dependent Claim
37 words
The endoprosthesis implant according to claim 1 wherein said stent covering comprises a plurality of fibers, said fibers having an average diameter that is larger than an average pore diameter of said pores in said first region.
Claim 9
Dependent Claim
31 words
The endoprosthesis implant according to claim 7 wherein said fibers have an average diameter of at least about three times said average pore diameter of the pores in the first region.
Claim 10
Dependent Claim
33 words
The endoprosthesis implant according to claim 1 wherein said pores in said first region have a shortest pore width of not less than about 30 micrometers and not greater than about 120 micrometers.
Claim 11
Dependent Claim
12 words
The endoprosthesis implant according to claim 7 wherein said fibers are woven.
Claim 12
Dependent Claim
12 words
The endoprosthesis implant according to claim 7 wherein said fibers are braided.
Claim 13
Dependent Claim
12 words
The endoprosthesis implant according to claim 7 wherein said fibers are knitted.
Claim 14
Dependent Claim
48 words
The endoprosthesis implant according to claim 1 wherein said stent covering comprises a substantially continuous polymeric sheet having pores interspersed in at least said first region, said pores having an average pore diameter and being spaced apart an average distance that is greater than said average pore diameter.
Claim 15
Dependent Claim
26 words
The endoprosthesis implant according to claim 13 wherein said pores are spaced apart an average distance of at least about 3 times said average pore diameter.
Claim 16
Dependent Claim
17 words
The endoprosthesis implant according to claim 13 wherein said pores are disposed only in said first region.
Claim 17
Dependent Claim
22 words
The endoprosthesis implant according to claim 13 wherein said second region is substantially impermeable to passage of body fluids under atmospheric pressure.
Claim 18
Dependent Claim
29 words
The endoprosthesis implant according to claim 13 wherein said pores have a shortest pore width of not less than about 30 micrometers and not greater than about 120 micrometers.
Claim 19
Dependent Claim
34 words
The endoprosthesis implant according to claim 1 wherein said pores in said first region have an average pore diameter and are spaced apart an average distance that is greater than said average pore diameter.
Claim 20
Dependent Claim
141 words
An endoprosthesis implant comprising: a) a stent having an expandable frame structure; b) a stent covering disposed on said stent, said stent covering including a first region having a structure adapted to promote tissue ingrowth, and a second region having a structure adapted to inhibit tissue ingrowth; c) the first region having a plurality of pores extending between an inner surface and a spaced apart outer surface of the stent covering defining a first porosity and the second region having a second porosity different than the first porosity, each pore in the first region having a pore diameter at the stent covering outer surface of from about 30 to about 120 micrometers; and d) an average distance between adjacent pores in the first region being at least about 3 times an average pore diameter of the pores in the first region.
Claim 21
Dependent Claim
141 words
An endoprosthesis implant comprising: a) a stent having an expandable frame structure; b) a stent covering disposed on said stent, said stent covering including a first region having a structure adapted to promote tissue ingrowth, and a second region having a structure adapted to inhibit tissue ingrowth; c) the first region having a plurality of pores extending between an inner surface and a spaced apart outer surface of the stent covering defining a first porosity and the second region having a second porosity different than the first porosity, each pore in the first region having a pore diameter at the stent covering outer surface of from about 30 to about 120 micrometers; and d) an average distance between adjacent pores in the first region being at least about 3 times an average pore diameter of the pores in the first region.
Claim 22
Dependent Claim
50 words
The endoprosthesis implant according to claim 19 wherein said stent covering is substantially cylindrical and has opposed ends, and said first region comprises portions of said stent covering adjacent said opposed ends, and said second region comprises a middle portion of said stent covering interposed between said first region portions.
Claim 23
Dependent Claim
83 words
The endoprosthesis implant according to claim 19 wherein said stent covering comprises a substantially continuous polymeric sheet having voids interspersed therein in at least said first region, said voids in said first region having an average diameter and being spaced apart a distance effective to promote tissue ingrowth into said stent covering in said first region, said second region having no voids, or voids having a diameter and spacing effective to inhibit tissue ingrowth h into said stent covering in said second region.
Claim 24
Dependent Claim
54 words
The endoprosthesis implant according to claim 21 wherein said average diameter of said voids in said first region is from about 30 to about 120 micrometers, and said voids in said first region are spaced apart an average distance of at least about 3 times said diameter of said voids in said first region.
Claim 25
Dependent Claim
50 words
The endoprosthesis implant according to claim 21 wherein said stent covering is substantially cylindrical and has opposed ends, and said first region comprises portions of said stent covering adjacent said opposed ends, and said second region comprises a middle portion of said stent covering interposed between said first region portions.
References Cited (Backward Citations)
US4321711A
Cited
US4255820A
Cited
US4921495A
Cited
US4733665A
Cited
US4733665C2
Cited
US4733665B1
Cited
US4743252A
Cited
US4878906A
Cited
US5104399A
Cited
EP0277678A1
Cited
US4816339A
Cited
US5019090A
Cited
US5024669A
Cited
US5024671A
Cited
US5152782A
Cited
US5084065A
Cited
US5123917A
Cited
US5282824A
Cited
US5330500A
Cited
US5135536A
Cited
US5413598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-22 | 2001-12-22 | 2002-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-22 | 2005-12-22 | 2006-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-22 | 2009-12-22 | 2010-06-23 | $7700.00 | Window Closed / Lapsed |