Patent US5702450A successfully refreshed from Google Patents.
US5702450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intervertebral disk prosthesis
Assignee: Individual
•
Filing: 1994-06-27
•
Granted: 1997-12-30
•
Expires: 2014-06-27
Abstract
Abstract An intervertebral disk prosthesis designed to replace at least partially an intervertebral disk which is composed of a left half-disk, and a right half-disk, each of the half-disks covering a half-disk surface. The prosthesis is at least one prosthetic member each of which having a rigid upper plate, a rigid lower plate, and an elastic cushion placed between the upper plate and the lower plate. The elastic cushion has an upper face attached to the upper plate and a lower face attached to the lower plate. Each prosthetic member covers no more than the half-disk surface so as to replace either or both of the left half-disk and the right half-disk.
Inventors
- 👤 Michel Bisserie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:35
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61F2/30767; A61F2/30771; A61F2/3094; A61F2/30965; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30069; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30153; A61F2002/30199; A61F2002/30261; A61F2002/30316; A61F2002/30535; A61F2002/30563; A61F2002/30604; A61F2002/30616; A61F2002/30841; A61F2002/30878; A61F2002/30891; A61F2002/30892; A61F2002/448; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2230/0019; A61F2230/0063; A61F2230/0082; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
156 words
Intervertebral disk prosthesis designed to replace at least partially an intervertebral disk which is composed of a left half-disk and a right half-disk, each of said half-disks being sized to cover a half disk surface, said prosthesis including at least one prosthetic member, each of said at least one prosthetic member comprising a rigid upper plate, a rigid lower plate, an elastic cushion placed between the upper plate and the lower plate and containing an upper face attached to said upper plate and a lower face attached to said lower plate, and each of said at least one prosthetic member being sized to cover no more than said half-disk surface so as to replace one of said left half-disk and said right half-disk, wherein rear edges of said upper plate and said lower plate are straight and remaining edges of the upper plate and the lower plate are rounded at each side, and within their thickness.
Claim 2
Dependent Claim
156 words
Intervertebral disk prosthesis designed to replace at least partially an intervertebral disk which is composed of a left half-disk and a right half-disk, each of said half-disks being sized to cover a half disk surface, said prosthesis including at least one prosthetic member, each of said at least one prosthetic member comprising a rigid upper plate, a rigid lower plate, an elastic cushion placed between the upper plate and the lower plate and containing an upper face attached to said upper plate and a lower face attached to said lower plate, and each of said at least one prosthetic member being sized to cover no more than said half-disk surface so as to replace one of said left half-disk and said right half-disk, wherein rear edges of said upper plate and said lower plate are straight and remaining edges of the upper plate and the lower plate are rounded at each side, and within their thickness.
Claim 3
Dependent Claim
25 words
Intervertebral disk prosthesis according to claim 1, wherein said prosthesis has a parallelepiped shape which enables surgical insertion by posterior approach through a spinal column.
Claim 4
Dependent Claim
19 words
Intervertebral disk prosthesis according to claim 1, wherein said upper plate and said lower plate are each substantially rectangular.
Claim 5
Dependent Claim
45 words
Intervertebral disk prosthesis according to claim 1, wherein each of said upper plate and said lower plate comprises at least one wedge shaped structure (5) on an external face oriented to prevent movement of the prosthesis in a specific direction after installation of said prosthesis.
Claim 6
Dependent Claim
57 words
Intervertebral disk prosthesis according to claim 4, wherein the external face (4) of each of said upper plate and said lower plate (1, 2) surrounding said at least one wedge shaped structure (5) is rough and has sharp edges facilitating bone rehabitation from vertebral bone surfaces against which said external faces are applied during the surgical implantation.
Claim 7
Dependent Claim
19 words
Intervertebral disk prosthesis according to claim 1, wherein said upper plate and said lower plate comprise extraction notches (6).
Claim 8
Dependent Claim
20 words
Intervertebral disk prosthesis according to claim 1, wherein the elastic cushion (3) is made of a laminated composite elastic material.
Claim 9
Dependent Claim
22 words
Intervertebral disk prosthesis according to claim 1, wherein the cushion (3) is made of silicone or a product in the polyolefins family.
Claim 10
Dependent Claim
39 words
Intervertebral disk prosthesis according to claim 1, wherein said prosthesis is formed of two prosthetic members, one of said two prosthetic members corresponding to said left half-disk and another of said two prosthetic members corresponding to said right half-disk.
References Cited (Backward Citations)
FR1122634A
Cited
US3867728A
Cited
US4834757A
Cited
US4772287A
Cited
US5522899A
Cited
EP0392076A1
Cited
US5071437A
Cited
WO1990011740A1
Cited
US5458638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-12-29 | 2001-06-30 | 2001-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-29 | 2005-06-30 | 2005-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-29 | 2009-06-30 | 2009-12-30 | $7700.00 | Window Closed / Lapsed |