US5092890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implant materials for hard tissue
Assignee: BASF SE
•
Filing: 1989-12-29
•
Granted: 1992-03-03
•
Expires: 2009-12-29
Abstract
Abstract An implant material for replacing hard tissue containing as essential components A) 30 to 95% by weight of a thermotropically mesomorphic polymer, B) 5 to 70% by weight of an apatite and C) 0 to 60% by weight of a fibrous or particulate filler which differs from B).
Inventors
- 👤 Heinz Pohlemann
- 👤 Bernd Hisgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:14
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/40; A61L27/44; A61L27/46; A61L27/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
An implant material for replacing hard tissue, containing as essential components A) 30 to 95% by weight of a thermotropically mesomorphic polymer wherein said polymer comprises at least one aromatic monomer unit, B) 5 to 70% by weight of an apatite and C) 0 to 60% by weight of a fibrous or particulate filler which differs from B).
Claim 2
Dependent Claim
58 words
An implant material for replacing hard tissue, containing as essential components A) 30 to 95% by weight of a thermotropically mesomorphic polymer wherein said polymer comprises at least one aromatic monomer unit, B) 5 to 70% by weight of an apatite and C) 0 to 60% by weight of a fibrous or particulate filler which differs from B).
Claim 3
Dependent Claim
42 words
An implant material as claimed in claim 1, wherein the thermotropically mesomorphic polymer is a polycondensate from the group consisting of polyesters, polyesters amides, polyester imides, polyester carbonates, polyether esters, polyether ester amides, polyester amide imides, polyester carbamides and polyether ester imides.
Claim 4
Dependent Claim
15 words
An implant material as claimed in claim 1 or 2, wherein the apatite is hydroxyapatite.
Claim 5
Dependent Claim
16 words
An implant material as claimed in claim 1, wherein said thermotropically mesomorphic polymer is completely aromatic.
Claim 6
Dependent Claim
21 words
An implant material as claimed in claim 1, wherein said thermotropically mesomorphic polymer contains monomer units derived from aromatic dicarboxylic acids.
Claim 7
Dependent Claim
41 words
An implant material as claimed in claim 1, wherein said thermotropically mesomorphic polymer contains monomer units derived from aromatic diols, aromatic diamines, aromatic diols substituted with an amino or hydroxyl group, or aromatic diamines substituted with an amino or hydroxyl group.
Claim 8
Dependent Claim
25 words
An implant material as claimed in claim 1, wherein said thermotropically mesomorphic polymer contains monomer units derived from aromatic hydroxycarboxylic acids or aromatic aminocarboxylic acids.
Claim 9
Dependent Claim
25 words
An implant material as claimed in claim 1, wherein said thermotropically mesomorphic polymer contains monomer units derived from aromatic thiocarboxylic acids, aromatic dithiols or thiophenols.
Claim 10
Dependent Claim
21 words
An implant material as claimed in claim 1, wherein said thermotropically mesomorphic polymer contains monomer units derived from aliphatic dicarboxylic acids.
Claim 11
Dependent Claim
41 words
An implant material as claimed in claim 1, wherein said thermotropically mesomorphic polymer contains monomer units derived from aliphatic diols, aliphatic diamines, aliphatic diols substituted with an amino or hydroxyl group or aliphatic diamines substituted with an amino or hydroxyl group.
Claim 12
Dependent Claim
28 words
An implant material as claimed in claim 1, wherein said thermotropically mesomorphic polymer contains monomer units derived from cis-1,4-cyclohexane dicarboxylic acid, trans-1,4-cyclohexane dicarboxylic acid or 1,3-cyclohexane dicarboxylic acid.
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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) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |