Patent US3560998A successfully refreshed from Google Patents.
Patent US5571187A successfully refreshed from Google Patents.
US5571187A
Expired / Lapsed
US
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Implant having a metallic porous surface
Assignee: Zimmer Technology Inc
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Filing: 1994-09-22
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Granted: 1996-11-05
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Expires: 2014-09-22
Abstract
Abstract An implant comprises a plastic body and a metallic, porous surface securely fixed to the body. The porous surface is attached to the body by infiltration of the body into the porous surface such that the body and porous surface interdigitate. A filler material is embedded in the porous surface to prevent total filling of the porous surface by the body.
Inventors
- 👤 Thirumal Devanathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:15
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B29C70/681; B29C70/683; A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30907; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/306; B29C45/00; B29C45/14; B29C45/14311; B29C45/14778; B29C45/14795; B29C70/74; B29C70/745; A61F2/3094; A61F2/32; A61F2/36; A61F2/3662; A61F2/3676; A61F2/30942; A61F2002/30957; A61F2002/30975; A61F2/3609; A61F2002/3625; B29C2045/14803; B29L; B29L2031/00; B29L2031/753; B29L2031/7532; Y; Y10; Y10S; Y10S623/00; Y10S623/901; Y10S623/92; Y10S623/923
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
An implant intermediate material comprising: a body including a first plastic; a porous material attached to the body by infiltration of the first plastic into the porous material wherein the filler material is more soluble in a solvent than is the body such that the body and porous material interdigitate; and a filler material including a second plastic embedded in the porous material.
Claim 2
Dependent Claim
63 words
An implant intermediate material comprising: a body including a first plastic; a porous material attached to the body by infiltration of the first plastic into the porous material wherein the filler material is more soluble in a solvent than is the body such that the body and porous material interdigitate; and a filler material including a second plastic embedded in the porous material.
Claim 3
Dependent Claim
38 words
The implant of claim 1 wherein the body is molded from a material which is able to be injection molded and the filler is stable at a temperature and pressure at which the body material is injection moldable.
Claim 4
Dependent Claim
20 words
The implant of claim 1 wherein the body includes a semicrystalline polymer and the filler material includes an amorphous polymer.
Claim 5
Dependent Claim
21 words
The implant of claim 1 wherein the body includes a polymer selected from the group consisting of polyaryletherketone, polyetheretherketone, and polyphenylinesulfide.
Claim 6
Dependent Claim
23 words
The implant of claim 1 wherein the filler material includes a polymer selected from the group consisting of polysulfone, polyethersulfone, polycarbonate, and polymethylmethacrylate.
Claim 7
Dependent Claim
13 words
The implant of claim 1 wherein the porous material comprises a metal structure.
Claim 8
Dependent Claim
25 words
The implant of claim 6 wherein the metal structure includes a metal selected from the group consisting of titanium, titanium alloys, and cobalt chromium steel.
Claim 9
Dependent Claim
22 words
The implant of claim 6 wherein the metal structure includes an element selected from the group consisting of wire and sintered beads.
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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) | 1999-11-05 | 2000-05-06 | 2000-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-05 | 2004-05-06 | 2004-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-05 | 2008-05-06 | 2008-11-05 | $7700.00 | Window Closed / Lapsed |