US6540784B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial bone implants
Assignee: The University of Texas System
•
Filing: 2001-01-19
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Granted: 2003-04-01
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Expires: 2021-01-19
Abstract
Abstract A process for making bone implants from calcium phosphate powders is disclosed. This process involves selectively fusing layers of calcium powders that have been coated or mixed with polymer binders. The calcium powder mixture may be formed into layers and the polymer fused with a laser. Complex three-dimensional geometrical shapes can be automatically replicated or modified using this approach.
Inventors
- 👤 Joel W. Barlow
- 👤 Goonhee Lee
- 👤 Richard H. Crawford
- 👤 Joseph J. Beaman
- 👤 Harris L. Marcus
- 👤 Richard J Lagow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:37
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/628; A; A61; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/30; A61F2/3094; A61F2/30942; A61L; A61L27/00; A61L27/40; A61L27/44; A61L27/46; B; B29; B29C; B29C64/00; B29C64/10; B29C64/141; B29C64/153; B29C64/165; B33; B33Y; B33Y70/00; B33Y80/00; C04B35/01; C04B35/447; C04B35/63; C04B35/632; C04B35/634; C04B35/63404; C04B35/63424; A61F2/2875; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2/30767; A61F2002/30929; A61F2002/30952; A61F2002/30968; A61F2230/00; A61F2230/0063; A61F2310/00; A61F2310/00005; A61F2310/00179; A61F2310/00293; B29L; B29L2031/00; B29L2031/753; B29L2031/7532; B33Y10/00; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3201; C04B2235/3205; C04B2235/3208; C04B2235/3212; C04B2235/36; C04B2235/50; C04B2235/54; C04B2235/5409; C04B2235/5418; C04B2235/5436; C04B2235/60; C04B2235/602; C04B2235/6026; C04B2235/608; C04B2235/61; C04B2235/616; C04B2235/65; C04B2235/658; C04B2235/6583; C04B2235/6584; C04B2235/66; C04B2235/665; C04B2235/70; C04B2235/74; C04B2235/77; C04B2235/80; C04B2235/96; C04B2235/9607; C04B2235/9615
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
47 words
An artificial bone implant comprising a calcium phosphate composition, wherein the implant has a designed complex three-dimensional shape with a well-defined cavity, the cavity having an opening to a surface, the opening having a smaller cross sectional area than the cavity, and has a controlled, interconnected porosity.
Claim 2
Dependent Claim
47 words
An artificial bone implant comprising a calcium phosphate composition, wherein the implant has a designed complex three-dimensional shape with a well-defined cavity, the cavity having an opening to a surface, the opening having a smaller cross sectional area than the cavity, and has a controlled, interconnected porosity.
Claim 3
Dependent Claim
22 words
The implant of claim 1 wherein the calcium phosphate composition has a mole ratio of calcium to phosphorus of 0.5 to 1.
Claim 4
Dependent Claim
13 words
The implant of claim 1 wherein the calcium phosphate composition is calcium metaphosphate.
Claim 5
Dependent Claim
13 words
The implant of claim 1 wherein the calcium phosphate composition is calcium pyrophosphate.
Claim 6
Dependent Claim
26 words
The implant of claim 1 wherein the calcium phosphate composition is calcium phosphate with from about 25 percent to about 45 percent by weight calcium oxide.
Claim 7
Dependent Claim
25 words
The implant of claim 1 wherein the calcium phosphate composition is calcium phosphate with from about 0.5 to about 2 percent by weight sodium oxide.
Claim 8
Dependent Claim
57 words
An artificial bone implant comprising a calcium phosphate composition, wherein the implant replicates a naturally complex bone geometry, has a complex three-dimensional shape with a well-defined cavity, the cavity replicating internal complex bone geometry, and has a controlled, interconnected porosity wherein the calcium phosphate composition has a mole ratio of calcium to phosphorus of 0.5 to 1.
Claim 9
Dependent Claim
57 words
An artificial bone implant comprising a calcium phosphate composition, wherein the implant replicates a naturally complex bone geometry, has a complex three-dimensional shape with a well-defined cavity, the cavity replicating internal complex bone geometry, and has a controlled, interconnected porosity wherein the calcium phosphate composition has a mole ratio of calcium to phosphorus of 0.5 to 1.
Claim 10
Dependent Claim
13 words
The implant of claim 7 wherein the calcium phosphate composition is calcium metaphosphate.
Claim 11
Dependent Claim
25 words
The implant of claim 7 wherein the calcium phosphate composition is calcium phosphate with from about 0.5 to about 2 percent by weight sodium oxide.
Claim 12
Dependent Claim
50 words
An artificial bone implant comprising layers of a calcium phosphate composition, wherein the implant replicates a naturally complex bone geometry, has a complex three-dimensional shape with a well-defined cavity, the cavity replicating internal complex bone geometry, has a controlled, interconnected porosity, and wherein the calcium phosphate composition is calcium metaphosphate.
Claim 13
Dependent Claim
50 words
An artificial bone implant comprising layers of a calcium phosphate composition, wherein the implant replicates a naturally complex bone geometry, has a complex three-dimensional shape with a well-defined cavity, the cavity replicating internal complex bone geometry, has a controlled, interconnected porosity, and wherein the calcium phosphate composition is calcium metaphosphate.
Claim 14
Dependent Claim
25 words
The implant of claim 10 wherein the calcium phosphate composition is calcium phosphate with from about 0.5 to about 2 percent by weight sodium oxide.
References Cited (Backward Citations)
US3379541A
Cited
US3859421A
Cited
US4048300A
Cited
US3905047A
Cited
US4135935A
Cited
US3913229A
Cited
US4046858A
Cited
US4207306A
Cited
US4131597A
Cited
US4149893A
Cited
US4113500A
Cited
US4230455A
Cited
US4097935A
Cited
US4223412A
Cited
US4222128A
Cited
US4224072A
Cited
US4308064A
Cited
US4274879A
Cited
US4330514A
Cited
US4324772A
Cited
US4761272A
Cited
US4436684A
Cited
US4436684B1
Cited
US4673355A
Cited
US4699742A
Cited
US4693986A
Cited
US4721615A
Cited
US5076869A
Cited
US5616294A
Cited
US5132143A
Cited
US4737411A
Cited
US4861733A
Cited
US5134009A
Cited
US4976736A
Cited
US5284695A
Cited
US5182170A
Cited
US5152791A
Cited
WO1992008567A1
Cited
US5370692A
Cited
US5510066A
Cited
US6048954A
Cited
WO1996005038A1
Cited
US5639402A
Cited
US6183515B1
Cited
US5783217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-03-31 | 2006-09-30 | 2007-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-03-31 | 2010-09-30 | 2011-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-03-31 | 2014-09-30 | 2015-04-01 | $7700.00 | Window Closed / Lapsed |