US4411027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bio-absorbable composite tissue scaffold
Assignee: Rutgers Health
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Filing: 1982-02-23
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Granted: 1983-10-25
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Expires: 2002-02-23
Abstract
Abstract The invention comprises a bio-compatible composition suitable for constructing surgical articles for the repair or replacement of a part of the body of a human or non-human animal, e.g., ligaments, tendons, bones, comprising a composite of a bio-absorbable polymer and at least one substrate of a plurality of carbon fibers. The invention also includes surgical articles fabricated from the composites for the repair of damaged tissue, e.g., tendons, ligaments and bones. The invention includes a method for the formation of the aforesaid composite comprising providing a substrate of the carbon fibers and providing the substrate with a continuous coating of a bio-absorbable polymer. The invention also includes the surgical repair of a damaged body part such as a ligament, tendon or bone comprising surgically affixing to the damaged part the surgical article, the bio-absorbable polymer being absorbed by the body upon formation of the new tissue.
Inventors
- 👤 Harold Alexander
- 👤 John R. Parsons
- 👤 Irving D. Strauchler
- 👤 Andrew B. Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:33
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/40; A61L27/44; A61L27/443; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/80; A61F; A61F2/00; A61F2/02; A61F2/08; A61F2/30; A61F2/3094; A61F2/30965; A61L27/28; A61L27/34; A61B2017/00004; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2210/00; A61F2210/0004; A61L2430/00; A61L2430/10; Y; Y10; Y10S; Y10S128/00; Y10S128/08
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
87 words
A bio-compatible composition suitable for fabricating a non-migratory surgical article for the repair or replacement of ligament or tendon fibrous tissue of a human or non-human animal comprising a substrate of a plurality of carbon fibers completely enveloped by a bio-absorbable and bio-compatible polymer wherein the longitudinal axes of said carbon fibers are oriented in substantially the same direction and wherein said fibers provide a scaffold which promotes the growth of new fibrous tissue which is oriented substantially parallel to the longitudinal axes of said carbon fibers.
Claim 2
Dependent Claim
87 words
A bio-compatible composition suitable for fabricating a non-migratory surgical article for the repair or replacement of ligament or tendon fibrous tissue of a human or non-human animal comprising a substrate of a plurality of carbon fibers completely enveloped by a bio-absorbable and bio-compatible polymer wherein the longitudinal axes of said carbon fibers are oriented in substantially the same direction and wherein said fibers provide a scaffold which promotes the growth of new fibrous tissue which is oriented substantially parallel to the longitudinal axes of said carbon fibers.
Claim 3
Dependent Claim
24 words
The composition of claim 1, wherein each of said fibers has a diameter in the range of from about 5 to about 15 microns.
Claim 4
Dependent Claim
18 words
The composition of claim 1, wherein each of said carbon fibers has a diameter of about 10 microns.
Claim 5
Dependent Claim
21 words
The composition of claim 1, wherein the said composite contains from about 30 to about 90%, by weight, of carbon fibers.
Claim 6
Dependent Claim
17 words
The composition of claim 1, wherein the said composite contains about 80%, by weight, of carbon fibers.
Claim 7
Dependent Claim
17 words
The composition of claim 1, wherein the said composite contains about 50%, by weight, of carbon fibers.
Claim 8
Dependent Claim
19 words
The composition of claim 1, wherein said at least one substrate comprises a substantially uniplanar layer of carbon fibers.
Claim 9
Dependent Claim
36 words
The composition of claim 7, wherein said composite comprises a plurality of said uniplanar layers in a stacked relationship, each of said layers being separated from the next adjacent layer by a layer of bio-absorbable polymer.
Claim 10
Dependent Claim
19 words
The composition of claim 1, wherein said polymer is selected from the group consisting of collagen and polyglycolic acid.
Claim 11
Dependent Claim
97 words
A bio-compatible non-migratory surgical article suitable for incorporation in the body of a human or non-human animal for the repair or replacement of ligament or tendon fibrous tissue thereof, said article constructed of a composite of at least one substrate of a plurality of carbon fibers completely enveloped by a bio-absorbable and bio-compatible polymer wherein the longitudinal axes of said carbon fibers are oriented in substantially the same direction and wherein said fibers provide a scaffold which promotes the growth of new fibrous tissue which is oriented substantially parallel to the longitudinal axes of said carbon fibers.
Claim 12
Dependent Claim
97 words
A bio-compatible non-migratory surgical article suitable for incorporation in the body of a human or non-human animal for the repair or replacement of ligament or tendon fibrous tissue thereof, said article constructed of a composite of at least one substrate of a plurality of carbon fibers completely enveloped by a bio-absorbable and bio-compatible polymer wherein the longitudinal axes of said carbon fibers are oriented in substantially the same direction and wherein said fibers provide a scaffold which promotes the growth of new fibrous tissue which is oriented substantially parallel to the longitudinal axes of said carbon fibers.
Claim 13
Dependent Claim
25 words
The article of claim 10, wherein each of said carbon fibers has a diameter in the range of from about 5 to about 15 microns.
Claim 14
Dependent Claim
19 words
The article of claim 11, wherein said polymer is selected from the group consisting of collagen and polyglycolic acid.
Claim 15
Dependent Claim
18 words
The article of claim 10, wherein each of said carbon fibers has a diameter of about 10 microns.
Claim 16
Dependent Claim
21 words
The article of claim 10, wherein the said composite contains from about 30 to about 90%, by weight, of carbon fibers.
Claim 17
Dependent Claim
17 words
The article of claim 10, wherein the said composite contains about 80%, by weight, of carbon fibers.
Claim 18
Dependent Claim
17 words
The composition of claim 10, wherein the said composite contains about 50%, by weight, of carbon fibers.
Claim 19
Dependent Claim
19 words
The article of claim 10, wherein said at least one substrate comprises a substantially uniplanar layer of carbon fibers.
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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) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |