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US5380547A
Expired / Lapsed
US
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Method for manufacturing titanium-containing orthopedic implant devices
Assignee: Biomet Manufacturing LLC
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Filing: 1994-03-21
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Granted: 1995-01-10
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Expires: 2014-03-21
Abstract
Abstract A method for treating orthopedic implants subject to wear and fatigue, and an orthopedic implant device treated in accordance with the described method. The orthopedic implant device is initially located in a reaction vessel. The outer surface of the orthopedic implant device is then subject to plasma nitriding so as to form a nitrogen enriched layer on the outer surface of the orthopedic implant device.
Inventors
- 👤 Joel C. Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:55
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/306; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; C; C23; C23C; C23C8/00; C23C8/06; C23C8/36; A61F2/3094; A61F2/32; A61F2/36; A61F2/3662; A61F2/367; A61F2002/30001; A61F2002/30316; A61F2002/30317; A61F2002/30322; A61F2/46; A61F2002/4631; A61F2250/00; A61F2250/0014; A61F2250/0026; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00389; A61F2310/00592; A61F2310/00856; Y; Y10; Y10S; Y10S623/00; Y10S623/92; Y10S623/923
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
A method of manufacturing a titanium-containing orthopedic implant device having an outer surface with enhanced wear resistant properties, comprising the steps of: locating said orthopedic implant device in a reaction vessel; sensing the temperature of said outer surface of said orthopedic implant device; treating said outer surface of said orthopedic implant device to produce a wear resistant layer on said outer surface, said step of treating said outer surface of said orthopedic implant device by plasma nitriding said outer surface at a temperature below about 730° C.; and controlling the treatment of said outer surface of said orthopedic implant device at least partially in response to the temperature of said outer surface.
Claim 2
Independent Claim
112 words
A method of manufacturing a titanium-containing orthopedic implant device having an outer surface with enhanced wear resistant properties, comprising the steps of: locating said orthopedic implant device in a reaction vessel; sensing the temperature of said outer surface of said orthopedic implant device; treating said outer surface of said orthopedic implant device to produce a wear resistant layer on said outer surface, said step of treating said outer surface of said orthopedic implant device by plasma nitriding said outer surface at a temperature below about 730° C.; and controlling the treatment of said outer surface of said orthopedic implant device at least partially in response to the temperature of said outer surface.
Claim 3
Dependent Claim
39 words
The method set forth in claim 1, wherein said step of sensing the temperature of said outer surface of said orthopedic implant device includes the step of using an optical pyrometer to measure the temperature of said outer surface.
Claim 4
Dependent Claim
40 words
The method of claim 1, wherein said step of sensing the temperature of said outer surface of said orthopedic implant device includes the step of measuring the temperature of said outer surface from a position external to said reaction vessel.
Claim 5
Dependent Claim
53 words
The method set forth in claim 1, wherein the step of controlling the treatment of said outer surface of said orthopedic implant device includes the step of maintaining the temperature of said outer surface substantially between 350° C. and 730° C. during at least a portion of the treatment of said outer surface.
Claim 6
Dependent Claim
48 words
The method set forth in claim 1, further comprising the additional steps of: a) washing said orthopedic implant device with a solvent operable to remove contaminants from said outer surface; and b) sputtering said outer surface of said orthopedic implant device to remove contaminants from said outer surface.
Claim 7
Dependent Claim
75 words
The method set forth in claim 1, wherein said step of treating said outer surface of said orthopedic implant device includes the steps of: (a) maintaining the temperature of the outer surface of said orthopedic implant device between about 350° C. and about 730° C. during at least a portion of the treatment of said outer surface; and (b) substantially maintaining the fatigue strength of said orthopedic implant device during treatment of said outer surface.
Claim 8
Independent Claim
115 words
A method for increasing the wear resistance of an orthopedic implant device having a titanium-containing outer surface, comprising the steps of: locating said orthopedic implant device in a reaction vessel; raising the temperature of said outer surface of said orthopedic implant device to within a temperature range of between about 350° C. and about 730° C. which substantially maintains the fatigue strength of said orthopedic implant device; plasma nitriding said outer surface of said orthopedic implant device so as to nitrogen enrich said outer surface of said orthopedic implant device; and controlling the treatment of said outer surface of said orthopedic implant device at least partially in response to the temperature of said outer surface.
Claim 9
Independent Claim
115 words
A method for increasing the wear resistance of an orthopedic implant device having a titanium-containing outer surface, comprising the steps of: locating said orthopedic implant device in a reaction vessel; raising the temperature of said outer surface of said orthopedic implant device to within a temperature range of between about 350° C. and about 730° C. which substantially maintains the fatigue strength of said orthopedic implant device; plasma nitriding said outer surface of said orthopedic implant device so as to nitrogen enrich said outer surface of said orthopedic implant device; and controlling the treatment of said outer surface of said orthopedic implant device at least partially in response to the temperature of said outer surface.
Claim 10
Dependent Claim
39 words
The method set forth in claim 7, wherein said step of controlling the treatment of said outer surface of said orthopedic implant device includes the step of using an optical pyrometer to measure the temperature of said outer surface.
Claim 11
Dependent Claim
40 words
The method of claim 7, wherein said step of controlling the treatment of said outer surface of said orthopedic implant device includes the step of measuring the temperature of said outer surface from a position external to said reaction vessel.
Claim 12
Dependent Claim
48 words
The method set forth in claim 7, further including the additional steps of: (a) washing said orthopedic implant device with a solvent operable to remove contaminants from said outer surface; and (b) sputtering said outer surface of said orthopedic implant device to remove contaminants from said outer surface.
References Cited (Backward Citations)
US4460415A
Cited
US4790851A
Cited
US4793871A
Cited
US4855026A
Cited
US5152795A
Cited
US5192323A
Cited
US5211768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-09 | 1998-07-11 | 1999-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-09 | 2002-07-11 | 2003-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-09 | 2006-07-11 | 2007-01-10 | $7700.00 | Window Closed / Lapsed |