US4687487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint implant
Assignee: ASSSOCIATION SUISSE POUR LA RECHERCHE HORLOGERE
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Filing: 1985-04-11
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Granted: 1987-08-18
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Expires: 2005-04-11
Abstract
Abstract The mutually sliding members of a joint implant are each coated with a hard material selected from the group consisting of titanium carbide, oxicarbide, nitride, oxinitride, carbonitride and oxicarbonitride in order to improve the sliding, wear resistance and adhesion properties of the members. A hip joint prosthesis is provided having a socket bowl coated with titanium (oxi)nitride or titanium (oxi)carbonitride with a thickness of from 2 to 3 microns and an articular head coated with titanium (oxi)carbide or titanium (oxi)carbonitride with a thickness of from 2 to 3 microns.
Inventors
- 👤 Hans-Erich Hintermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:59
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/30767; A61F2/3094; A61F2/34; A61F2002/30934; A61F2002/3445; A61F2002/3446; A61F2/36; A61F2/3609; A61F2002/3611; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00029; A61F2310/00389; A61F2310/00592; A61F2310/0073; A61F2310/00748; A61F2310/00856; A61F2310/0088
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
78 words
A tribological system comprising a first and second member, which together comprise a joint implant, each said member having a surface, said surface of said first member slidingly engaging said surface of said second member, a hard material coating on each of said surfaces, said hard material coating on said first member being titanium carbonitride, and said hard material coating on said second member being selected from the group consisting of titanium carbide, titanium nitride and titanium carbonitride.
Claim 2
Dependent Claim
78 words
A tribological system comprising a first and second member, which together comprise a joint implant, each said member having a surface, said surface of said first member slidingly engaging said surface of said second member, a hard material coating on each of said surfaces, said hard material coating on said first member being titanium carbonitride, and said hard material coating on said second member being selected from the group consisting of titanium carbide, titanium nitride and titanium carbonitride.
Claim 3
Dependent Claim
20 words
A tribological system according to claim 1, wherein each said hard material coating has a thickness of from 1-5 microns.
Claim 4
Dependent Claim
30 words
A tribological system according to claim 1, wherein at least one of said first and second members comprises a metal selected from the group consisting of iron, cobalt and titanium.
Claim 5
Dependent Claim
31 words
A tribological system according to claim 1, wherein said first member comprises a socket bowl, said second member comprises an articular head and said articular head slidingly engages said socket bowl.
Claim 6
Dependent Claim
76 words
A tribological system comprising a first and second member, which together comprise a joint implant, each said member having a surface, said surface of said first member slidingly engaging said surface of said second member, a hard material coating on each of said surfaces, said hard material coating on said first member being titanium oxicarbide and said hard material coating on said second member being selected from the group consisting of titanium nitride and titanium carbonitride.
Claim 7
Dependent Claim
76 words
A tribological system comprising a first and second member, which together comprise a joint implant, each said member having a surface, said surface of said first member slidingly engaging said surface of said second member, a hard material coating on each of said surfaces, said hard material coating on said first member being titanium oxicarbide and said hard material coating on said second member being selected from the group consisting of titanium nitride and titanium carbonitride.
Claim 8
Dependent Claim
20 words
A tribological system according to claim 5, wherein each said hard material coating has a thickness of from 1-5 microns.
Claim 9
Dependent Claim
30 words
A tribological system according to claim 5, wherein at least one of said first and second members comprises a metal selected from the group consisting of iron, cobalt and titanium.
Claim 10
Dependent Claim
31 words
A tribological system according to claim 5, wherein said first member comprises a socket bowl, said second member comprises an articular head and said articular head slidingly engages said socket bowl.
Claim 11
Dependent Claim
85 words
A tribological system comprising a first and second member, which together comprise a joint implant, each said member having a surface, said surface of said first member slidingly engaging said surface of said second member, a hard material coating on each of said surfaces, said hard material coating on said first member being selected from the group consisting of titanium carbide and titanium carbonitride, and said hard material coating on said second member being selected from the group consisting of titanium oxinitride and titanium oxicarbonitride.
Claim 12
Dependent Claim
85 words
A tribological system comprising a first and second member, which together comprise a joint implant, each said member having a surface, said surface of said first member slidingly engaging said surface of said second member, a hard material coating on each of said surfaces, said hard material coating on said first member being selected from the group consisting of titanium carbide and titanium carbonitride, and said hard material coating on said second member being selected from the group consisting of titanium oxinitride and titanium oxicarbonitride.
Claim 13
Dependent Claim
20 words
A tribological system according to claim 9, wherein each said hard material coating has a thickness of from 1-5 microns.
Claim 14
Dependent Claim
30 words
A tribological system according to claim 9, wherein at least one of said first and second members comprises a metal selected from the group consisting of iron, cobalt and titanium.
Claim 15
Dependent Claim
31 words
A tribological system according to claim 9, wherein said first member comprises a socket bowl, said second member comprises an articular head and said articular head slidingly engages said socket bowl.
Claim 16
Dependent Claim
85 words
A tribological system comprising a first and second member, which together comprise a joint implant, each said member having a surface, said surface of said first member slidingly engaging said surface of said second member, a hard material coating on each of said surfaces, said hard material coating on said first member being selected from the group consisting of titanium oxicarbide and titanium oxicarbonitride, and said hard material coating on said second member being selected from the group consisting of titanium oxinitride and titanium oxicarbonitride.
Claim 17
Dependent Claim
85 words
A tribological system comprising a first and second member, which together comprise a joint implant, each said member having a surface, said surface of said first member slidingly engaging said surface of said second member, a hard material coating on each of said surfaces, said hard material coating on said first member being selected from the group consisting of titanium oxicarbide and titanium oxicarbonitride, and said hard material coating on said second member being selected from the group consisting of titanium oxinitride and titanium oxicarbonitride.
Claim 18
Dependent Claim
20 words
A tribological system according to claim 13, wherein each said hard material coating has a thickness of from 1-5 microns.
Claim 19
Dependent Claim
30 words
A tribological system according to claim 13, wherein at least one of said first and second members comprises a metal selected from the group consisting of iron, cobalt and titanium.
Claim 20
Dependent Claim
31 words
A tribological system according to claim 13, wherein said first member comprises a socket bowl, said second member comprises an articular head and said articular head slidingly engages said socket bowl.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |