
US Patent No: 6,482,234
Number of patents in Portfolio can not be more than 2000
Prosthetic spinal disc
Stats
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Nov 19, 2002
Issued date -
Apr 26, 2000
filing date -
09/558,896
serial no -
Expired
status
Importance
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Abstract
A prosthetic spinal disc may include a nucleus and an annulus that together may be optionally shaped, using a computed tomography (CT) scan, ultrasound imaging and/or magnetic resonance imaging (MRI). The nucleus includes a central area having a material density that is different than the material density of the annulus. The nucleus may alternately include an area for the introduction of a central supporting fluid or gel. An optional fiberoptic carriage may be used to provide tissue ingrowth from the supported vertebrae and optional internal baffling provides additional stabilization.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,932,969 Joint endoprosthesis | 318 | 1987 | |
| 5,171,280 Intervertebral prosthesis | 329 | 1991 | |
| 5,755,797 Intervertebral prosthesis and a process for implanting such a prosthesis | 263 | 1996 | |
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| 5,047,055 Hydrogel intervertebral disc nucleus | 531 | 1990 | |
| 5,192,326 Hydrogel bead intervertebral disc nucleus | 448 | 1991 | |
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| 5,035,716 Replacement disc | 198 | 1990 | |
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| 5,123,926 Artificial spinal prosthesis | 483 | 1991 | |
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| 5,571,189 Expandable fabric implant for stabilizing the spinal motion segment | 496 | 1994 | |
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| 4,863,477 Synthetic intervertebral disc prosthesis | 464 | 1987 | |
| 6,187,043 Implantable prosthetic device | 58 | 1997 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 19, 2014 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |