Patent US5035716A successfully refreshed from Google Patents.
US5035716A
Expired / Lapsed
US
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Replacement disc
Assignee: Individual
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Filing: 1990-05-10
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Granted: 1991-07-30
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Expires: 2010-05-10
Abstract
Abstract A replacement disc for use between adjacent vertebrae comprising: a body portion having substantially opposing first and second surfaces and being adapted to fit and be held between the adjacent vertebrae; first securement means extending out from the first surface and acting to secure the replacement disc to the first adjacent vertebrae; and second securement means extending out from the second surface and acting to secure the replacement disc to the second adjacent vertebrae.
Inventors
- 👤 Ernest L. Downey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:58
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61F2/4455; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30016; A61F2002/3006; A61F2002/30069; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30448; A61F2002/30474; A61F2002/30535; A61F2002/30563; A61F2002/30621; A61F2002/30647; A61F2/30767; A61F2/30771; A61F2002/30795; A61F2002/3085; A61F2002/30878; A61F2002/30886; A61F2/3094; A61F2002/30975; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/005; A61F2250/00; A61F2250/0014; A61F2250/0019
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
56 words
A replacement disc for use between adjacent vertebrae comprising: an outer portion; and an inner portion substantially completely surrounded by said outer portion, said inner portion being made of a flexible foamed polyethylene and being softer than said outer portion, said replacement disc being sized and shaped to fit the be held between said adjacent vertebrae.
Claim 2
Dependent Claim
56 words
A replacement disc for use between adjacent vertebrae comprising: an outer portion; and an inner portion substantially completely surrounded by said outer portion, said inner portion being made of a flexible foamed polyethylene and being softer than said outer portion, said replacement disc being sized and shaped to fit the be held between said adjacent vertebrae.
Claim 3
Dependent Claim
20 words
The replacement disc of claim 1 wherein both said outer portion and said inner portion are made of polymeric material.
Claim 4
Dependent Claim
15 words
The replacement disc of claim 2 wherein said outer portion is made of silicone elastomer.
Claim 5
Dependent Claim
16 words
The replacement of disc of claim 2 wherein said outer portion is made of silastic elastomer.
Claim 6
Dependent Claim
68 words
A replacement disc for use between adjacent vertebrae comprising: an outer portion; and an inner portion substantially completely surrounded by said outer portion, said inner portion consisting essentially of a solid foamed material and being softer than said outer portion, said replacement disc being shaped in substantially the form of a natural disc which is normally present between said adjacent vertebrae, and being located between said adjacent vertebrae.
Claim 7
Dependent Claim
68 words
A replacement disc for use between adjacent vertebrae comprising: an outer portion; and an inner portion substantially completely surrounded by said outer portion, said inner portion consisting essentially of a solid foamed material and being softer than said outer portion, said replacement disc being shaped in substantially the form of a natural disc which is normally present between said adjacent vertebrae, and being located between said adjacent vertebrae.
Claim 8
Dependent Claim
20 words
The replacement disc of claim 5 wherein both said outer portion and said inner portion are made of polymeric material.
Claim 9
Dependent Claim
15 words
The replacement disc of claim 6 wherein said outer portion is made of silicone elastomer.
Claim 10
Dependent Claim
15 words
The replacement disc of claim 6 wherein said outer portion is made of silastic elastomer.
Claim 11
Dependent Claim
17 words
The replacement disc of claim 5 wherein said inner portion is made of a polymeric foamed material.
Claim 12
Dependent Claim
16 words
The replacement disc of claim 6 wherein said inner portion is made of flexible foamed polyethylene.
Claim 13
Dependent Claim
69 words
A replacement disc for use between adjacent vertebrae comprising: an outer portion; and an inner portion substantially completely surrounded by said outer portion, said inner portion being made of a foamed material and being softer than said outer portion, said replacement disc being sized and shaped in substantially the form of a natural disc which is present between adjacent vertebrae to fit and be held between said adjacent vertebrae.
Claim 14
Dependent Claim
69 words
A replacement disc for use between adjacent vertebrae comprising: an outer portion; and an inner portion substantially completely surrounded by said outer portion, said inner portion being made of a foamed material and being softer than said outer portion, said replacement disc being sized and shaped in substantially the form of a natural disc which is present between adjacent vertebrae to fit and be held between said adjacent vertebrae.
Claim 15
Dependent Claim
21 words
The replacement disc of claim 1 shaped in substantially the form of a natural disc which is present between adjacent vertebra.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |