US4784159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making an implantable device having plasma sprayed metallic porous surface
Assignee: Pacesetter Inc
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Filing: 1986-08-19
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Granted: 1988-11-15
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Expires: 2006-08-19
Abstract
Abstract An implantable device, appliance or component thereof is provided which includes a porous coating of elemental metal, which porous coating is prepared by subjecting a blend of elemental metal powder and a reductive gas atmosphere to plasma deposition conditions and spraying same onto the device, appliance or component onto which the porous coating is thereby formed.
Inventors
- 👤 Paul J. Szilagyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:22
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61N1/0565
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
211 words
A device or appliance that is implantable in organic tissue and that has a surface for enhancing organic tissue ingrowth thereinto, the device or appliance having been made by a process comprising: providing a shaped substrate member having an electrically conductive surface; blending a supply of electrically conductive elemental metal particles with a reductive gaseous environment in order to form a plasma deposition blend, said reductive gaseous environment including a reductive gas that substantially eliminates oxidation of the elemental metal particles during their subsequent plasma deposition within said reductive gaseous environment; subjecting said plasma deposition blend to a source of energy in order to plasma excite said plasma deposition blend within said reductive gaseous environment; spraying said excited plasma deposition blend onto said electrically conductive surface of the shaped substrate member within said reductive gaseous environment in order to thereby form a porous coating of substantially unoxidized elemental metal and pores onto said electrically conductive surface of the shaped substrate member; and said steps of subjecting said plasma deposition blend to a source of energy in order to plasma excite it and spraying said excited plasma deposition blend onto said electrically conductive surface raise the temperature of the electrically conductive surface to a temperature significantly lower than a metal sintering temperature.
Claim 2
Independent Claim
211 words
A device or appliance that is implantable in organic tissue and that has a surface for enhancing organic tissue ingrowth thereinto, the device or appliance having been made by a process comprising: providing a shaped substrate member having an electrically conductive surface; blending a supply of electrically conductive elemental metal particles with a reductive gaseous environment in order to form a plasma deposition blend, said reductive gaseous environment including a reductive gas that substantially eliminates oxidation of the elemental metal particles during their subsequent plasma deposition within said reductive gaseous environment; subjecting said plasma deposition blend to a source of energy in order to plasma excite said plasma deposition blend within said reductive gaseous environment; spraying said excited plasma deposition blend onto said electrically conductive surface of the shaped substrate member within said reductive gaseous environment in order to thereby form a porous coating of substantially unoxidized elemental metal and pores onto said electrically conductive surface of the shaped substrate member; and said steps of subjecting said plasma deposition blend to a source of energy in order to plasma excite it and spraying said excited plasma deposition blend onto said electrically conductive surface raise the temperature of the electrically conductive surface to a temperature significantly lower than a metal sintering temperature.
Claim 3
Dependent Claim
51 words
The implantable device or appliance according to claim 1, wherein said subjecting step heats said elemental metal particles to a substantially molten state, and said spraying step directs said substantially molten elemental metal particles onto said electrically conductive surface, after which said substantially molten elemental particles solidify into said porous coating.
Claim 4
Dependent Claim
19 words
The implantable device or appliance according to claim 1, further including applying a conductive coating over said porous coating.
Claim 5
Dependent Claim
20 words
The implantable device or appliance according to claim 1, further including applying a conductive carbon coating over said porous coating.
Claim 6
Dependent Claim
27 words
The implantable device or appliance according to claim 1, wherein said elemental metal particles are selected from the group consisting of titanium, tungsten, chromium and alloys thereof.
Claim 7
Dependent Claim
16 words
The implantable device or appliance according to claim 1, wherein said reductive gas is hydrogen gas.
Claim 8
Dependent Claim
19 words
The implantable device or appliance according to claim 1, wherein said reductive gaseous environment further includes an inert gas.
Claim 9
Dependent Claim
161 words
A process for making a porous component of a device or appliance that is implantable in organic tissue, the porous component having a surface for enhancing organic tissue ingrowth thereinto, comprising: providing a shaped substrate member having an electrically conductive surface; blending a supply of electrically conductive elemental metal particles with a reductive gaseous environment in order to form a plasma deposition blend, said reductive gaseous environment including a reductive gas that substantially eliminates oxidation of the elemental metal particles during their subsequent plasma deposition within said reductive gaseous environment; subjecting said plasma deposition blend to a source of energy in order to plasma excite said plasma deposition blend within said reductive gaseous environment; spraying said excited plasma deposition blend onto said electrically conductive surface of the shaped substrate member within said reductive gaseous environment in order to thereby form a porous coating of substantially unoxidized elemental metal and pores onto said electrically conductive surface of the shaped substrate member; and
Claim 10
Dependent Claim
161 words
A process for making a porous component of a device or appliance that is implantable in organic tissue, the porous component having a surface for enhancing organic tissue ingrowth thereinto, comprising: providing a shaped substrate member having an electrically conductive surface; blending a supply of electrically conductive elemental metal particles with a reductive gaseous environment in order to form a plasma deposition blend, said reductive gaseous environment including a reductive gas that substantially eliminates oxidation of the elemental metal particles during their subsequent plasma deposition within said reductive gaseous environment; subjecting said plasma deposition blend to a source of energy in order to plasma excite said plasma deposition blend within said reductive gaseous environment; spraying said excited plasma deposition blend onto said electrically conductive surface of the shaped substrate member within said reductive gaseous environment in order to thereby form a porous coating of substantially unoxidized elemental metal and pores onto said electrically conductive surface of the shaped substrate member; and
Claim 11
Dependent Claim
49 words
said steps of subjecting said plasma deposition blend to a source of energy in order to plasma excite it and spraying said excited plasma deposition blend onto said electrically conductive surface raise the temperature of the electrically conductive surface to a temperature significantly lower than a metal sintering temperature.
Claim 12
Dependent Claim
49 words
said steps of subjecting said plasma deposition blend to a source of energy in order to plasma excite it and spraying said excited plasma deposition blend onto said electrically conductive surface raise the temperature of the electrically conductive surface to a temperature significantly lower than a metal sintering temperature.
Claim 13
Dependent Claim
48 words
The process according to claim 8, wherein said subjecting step heats said elemental metal particles to a substantially molten state, and said spraying step directs said substantially molten elemental metal particles onto said electrically conductive surface, after which said substantially molten elemental particles solidify into said porous coating.
Claim 14
Dependent Claim
16 words
The process according to claim 8, further including applying a conductive coating over said porous coating.
Claim 15
Dependent Claim
24 words
The process according to claim 8, wherein said elemental metal particles are selected from the group consisting of titanium, tungsten, chromium and alloys thereof.
Claim 16
Dependent Claim
15 words
The process according to claim 8 wherein said reductive gaseous environment includes an inert gas.
Claim 17
Dependent Claim
27 words
The process according to claim 8, wherein said subjecting and spraying steps raise the electrically conductive surface to a temperature on the order of approximately 300° C.
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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) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |