US6355058B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stent with radiopaque coating consisting of particles in a binder
Assignee: Abbott Cardiovascular Systems Inc
•
Filing: 1999-12-30
•
Granted: 2002-03-12
•
Expires: 2019-12-30
Abstract
Abstract A stent configuration wherein particles of radiopaque material contained within a polymeric binder is coated onto a stent core structure to enhance the radiopacity of the stent. The stent is initially formed and rendered radiopaque after all surfaces are coated with the radiopaque coating. The amount of particles of radiopaque materials can be varied (by volume) within the binder to either increase or decrease the radiopacity of the binder coating in order to obtain an optimal amount of radiopacity to the stent. The thickness of the coating also can be varied to fine tune the radiopacity of the stent.
Inventors
- 👤 Stephen Pacetti
- 👤 Joanna Mroz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:46
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/22; A; A61; A61L; A61L29/00; A61L29/14; A61L29/18; A61L31/00; A61L31/14; A61L31/18
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
57 words
A radiopaque stent, comprising: a central core structure defining the shape of the stent; and a biocompatible outer radiopaque coating having particles of a radiopaque material dispersed within a binder which coats the central core structure, wherein the size of the particles of radiopaque material is no more than one tenth of the thickness of the coating.
Claim 2
Dependent Claim
57 words
A radiopaque stent, comprising: a central core structure defining the shape of the stent; and a biocompatible outer radiopaque coating having particles of a radiopaque material dispersed within a binder which coats the central core structure, wherein the size of the particles of radiopaque material is no more than one tenth of the thickness of the coating.
Claim 3
Dependent Claim
34 words
The stent of claim 1 , wherein said central core structure is made from a material selected from the group consisting of stainless steel alloys, cobalt chromium alloys, titanium alloys, and cobalt-chromium molybdenum alloys.
Claim 4
Dependent Claim
17 words
The stent of claim 1 , wherein said central core structure is made from a nickel-titanium alloy.
Claim 5
Dependent Claim
51 words
The stent of claim 1 , wherein said radiopaque particle material is formed from the group of materials consisting of gold, platinum, iridium, tantalum, silver, molybdenum, iodine and its salts or compounds, barium and its salts or compounds, bismuth and its salts or compounds, tungsten, rhenium, osmium, noble metals and palladium.
Claim 6
Dependent Claim
20 words
The stent of claim 1 , wherein radiopaque coating has a thickness in the range of 0.1 to 25 microns.
Claim 7
Dependent Claim
27 words
The stent of claim 1 , wherein the percentage of particles of radiopaque material within the binder is in the range of 10% to 66% by volume.
Claim 8
Dependent Claim
22 words
The stent of claim 1 , wherein the percentage of particles of radiopaque material within the binder is approximately 15-40% by volume.
Claim 9
Dependent Claim
21 words
The stent of claim 1 , wherein the binder is formed from the group of materials consisting of polymers and biopolymers.
Claim 10
Dependent Claim
16 words
The stent of claim 1 , wherein the binder consists of a polymer which is biostable.
Claim 11
Dependent Claim
84 words
The stent of claim 1 , wherein the binder is formed from the group of materials consisting of polytetrafluoroethylene, fluorinated ethylene-propylene, polyvinylidene fluoride, silicone, polyether urethanes, polycarbonate urethanes, urethanes containing surface modifying additives where these additives provide silicone, hydrocarbon, polyethylene glycol, or perfluorocarbon chains on the surface, polyurethanes with surface modifying endgroups consisting of silicone, hydrocarbon, polyethylene glycol or perfluoropolymer chains, olefinic polymers including polyethylene and polypropylene, ethylene polymers such as ethylene vinyl acetate and ethylene covinyl alcohol, and polymide, polyetheretherketone, polyaryletherketone and polysulfone.
Claim 12
Dependent Claim
36 words
The stent of claim 1 , wherein the binder is formed from the group of materials consisting of L-polylactide, polylactic acid, polyglycolic acid, copolymers of lactic and glycolic acid, polycaprolactone, polyanhydrides, polyphosphoesters, polyphosphazenes, polyhydroxyvalerate, and polyhydroxybutyrate.
Claim 13
Dependent Claim
42 words
The stent of claim 1 , wherein the binder is formed from the group of materials consisting of fibrin, elastin, hyaluronic acid, chondroitin sulfate, heparin sulfate, heparin sulfate with hydrophobic counterions, heparin covalently bonded to the underlying surface, albumin, gelatin, and collagen.
Claim 14
Dependent Claim
19 words
The stent of claim 1 , wherein said radiopaque material is applied to all surfaces of the central core.
Claim 15
Dependent Claim
21 words
The stent of claim 1 , wherein said radiopaque material is applied to less than all surfaces of the central core.
Claim 16
Independent Claim
61 words
A method for forming a radiopaque stent, comprising the steps of: providing a tube of structural material; forming voids in said tube to render said tube expandable; and coating said expandable tube with a binder having particles of a radiopaque material, wherein the size of the particle of radiopaque material is no more than one-tenth of the thickness of the coating.
Claim 17
Independent Claim
61 words
A method for forming a radiopaque stent, comprising the steps of: providing a tube of structural material; forming voids in said tube to render said tube expandable; and coating said expandable tube with a binder having particles of a radiopaque material, wherein the size of the particle of radiopaque material is no more than one-tenth of the thickness of the coating.
Claim 18
Dependent Claim
20 words
The method of claim 15 , further comprising the step of electropolishing said expandable tube prior to said coating step.
Claim 19
Dependent Claim
17 words
The method of claim 15 , wherein said voids are formed in said tube by laser cutting.
Claim 20
Dependent Claim
28 words
The method of claim 15 , wherein the method of coating the expandable tube includes spraying, dipping, brushing, wiping, pad printing, elecrostatic liquid spraying, and electrostatic powder coating.
Claim 21
Dependent Claim
19 words
The method of claim 15 , wherein said radiopaque coating is applied to all portions of said expandable tube.
Claim 22
Dependent Claim
20 words
The method of claim 15 , wherein said radiopaque coating is applied to only selected portions of said expandable tube.
Claim 23
Dependent Claim
54 words
The method of claim 15 , wherein the particles of radiopaque material are selected from the group consisting of iodine and its salts or compounds, barium and its salts or compounds, bismuth and its salts or compounds, tungsten, rhenium, osmium, noble metals, palladium, gold, colloidal gold, molybdenum, silver, platinum, tantalum, iridium and their alloys.
Claim 24
Dependent Claim
46 words
A radiopaque stent, comprising: a central core structure defining the shape of said stent; and a biocompatible outer radiopaque coating having particles of a radiopaque material dispersed within a binder which coats the central core structure, the particles being made from a material having temporary radiopacity.
Claim 25
Dependent Claim
46 words
A radiopaque stent, comprising: a central core structure defining the shape of said stent; and a biocompatible outer radiopaque coating having particles of a radiopaque material dispersed within a binder which coats the central core structure, the particles being made from a material having temporary radiopacity.
Claim 26
Dependent Claim
34 words
The stent of claim 22 , wherein said central core structure is made from a material selected from the group consisting of stainless steel alloys, cobalt chromium alloys, titanium alloys, and cobalt-chromium molybdenum alloys.
Claim 27
Dependent Claim
17 words
The stent of claim 22 , wherein said central core structure is made from a nickel-titanium alloy.
Claim 28
Dependent Claim
19 words
The stent of claim 22 , wherein the radiopaque material is formed from 1-polylactide containing barium or iodine salts.
Claim 29
Dependent Claim
20 words
The stent of claim 22 , wherein radiopaque coating has a thickness in the range of 0.1 to 25 microns.
References Cited (Backward Citations)
US3105492A
Cited
US3657744A
Cited
US3993078A
Cited
US4140126A
Cited
US4159719A
Cited
US4130904A
Cited
GB2070490B
Cited
EP0045627B1
Cited
US4387952A
Cited
EP0062300A2
Cited
US4553545A
Cited
GB2135585B
Cited
US4655771B1
Cited
US4655771A
Cited
US4504354A
Cited
US4531933A
Cited
US4512338A
Cited
US4503569A
Cited
US4619246A
Cited
US4580568A
Cited
US5037377A
Cited
US4706671A
Cited
US4650466A
Cited
US4733665B1
Cited
US4776337B1
Cited
US4739762A
Cited
US5102417A
Cited
EP0221570B1
Cited
US4776337A
Cited
US4733665A
Cited
US4739762B1
Cited
US4733665C2
Cited
US4922905A
Cited
US4681110A
Cited
US4649922A
Cited
US4767418A
Cited
US4878906A
Cited
US5061275A
Cited
US4740207A
Cited
US4848343A
Cited
US4762128A
Cited
US4893623A
Cited
US4907336A
Cited
US5314444A
Cited
US4800882A
Cited
US5041126A
Cited
US5037427A
Cited
US5059211A
Cited
US4795458A
Cited
US4969458A
Cited
US4969890A
Cited
US5089005A
Cited
EP0380668B1
Cited
US5133732A
Cited
US4886062A
Cited
US5192307A
Cited
US4998539A
Cited
US4870966A
Cited
US4877030A
Cited
US4892539A
Cited
EP0335341B1
Cited
EP0338816B1
Cited
US4986831A
Cited
US4830003A
Cited
US5092877A
Cited
US5019090A
Cited
US5226913A
Cited
EP0357003B2
Cited
EP0361192B1
Cited
US4943346A
Cited
EP0364787B1
Cited
US5195984A
Cited
US4963022A
Cited
US4913141A
Cited
US5019085A
Cited
US4950227A
Cited
EP0372789A3
Cited
US4856516A
Cited
US5078726A
Cited
US5163958A
Cited
US5007926A
Cited
US5062829A
Cited
US5100429A
Cited
US4990155A
Cited
US4994071A
Cited
US5037392A
Cited
US5116318A
Cited
US5015253A
Cited
US5171262A
Cited
EP0407951A3
Cited
US5084065A
Cited
US5026377A
Cited
US5292331A
Cited
US5180368A
Cited
US5034001A
Cited
US5002560A
Cited
EP0421729B1
Cited
US5104404A
Cited
US5035706A
Cited
EP0423916B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-03-11 | 2005-09-10 | 2006-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-03-11 | 2009-09-10 | 2010-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-03-11 | 2013-09-10 | 2014-03-12 | $7700.00 | Window Closed / Lapsed |