Patent US5538514A successfully refreshed from Google Patents.
US5538514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming bone cement to an implant
Assignee: Zimmer Technology Inc
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Filing: 1994-04-07
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Granted: 1996-07-23
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Expires: 2014-04-07
Abstract
Abstract A method for molding bone cement to a prosthetic implant in which a cement mixture absent any amine initiators is molded about the implant and polymerization is initiated by exposing the cement mixture to a radiation source. The method eliminates the manufacturing timing problems of molding a polymerizing bone cement mixture to an implant.
Inventors
- 👤 Michael E. Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:42
CPC Classifications
A; A61; A61L; A61L24/00; A61L24/04; A61L24/06; A61L27/00; A61L27/28; A61L27/34; A61L2430/00; A61L2430/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A method for molding a bone cement mixture to an implant comprising the steps of: a. providing a mold having a cavity, b. fitting said implant within said cavity; c. introducing said bone cement mixture in a fluid state into said cavity about said implant, said bone cement mixture includes a liquid monomer; d. exposing said bone cement mixture to a radiation source in the electromagnetic spectrum to initiate polymerization of said liquid monomer whereby said bone cement hardens to said implant.
Claim 2
Independent Claim
82 words
A method for molding a bone cement mixture to an implant comprising the steps of: a. providing a mold having a cavity, b. fitting said implant within said cavity; c. introducing said bone cement mixture in a fluid state into said cavity about said implant, said bone cement mixture includes a liquid monomer; d. exposing said bone cement mixture to a radiation source in the electromagnetic spectrum to initiate polymerization of said liquid monomer whereby said bone cement hardens to said implant.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said radiation source in step c is gamma ray radiation.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein said radiation in step c is X-ray radiation.
References Cited (Backward Citations)
US4141864A
Cited
US4244689A
Cited
US4281420A
Cited
US4365359A
Cited
US4593064A
Cited
US4550136B1
Cited
US4550136A
Cited
US4341691A
Cited
US4374936A
Cited
US4412015A
Cited
US4574130A
Cited
US4554686A
Cited
US4542167A
Cited
US4813876A
Cited
US4668295A
Cited
US4808184A
Cited
US4678436A
Cited
US4718910A
Cited
US4645503A
Cited
US4791150A
Cited
US4886843A
Cited
US4812120A
Cited
US5189077A
Cited
US5189077B1
Cited
US5276070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-23 | 2000-01-22 | 2000-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-23 | 2004-01-22 | 2004-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-23 | 2008-01-22 | 2008-07-23 | $7700.00 | Window Closed / Lapsed |