US4407787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collagenous dressing
Assignee: RUHLAND NACHF (DR) GmbH
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Filing: 1981-09-21
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Granted: 1983-10-04
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Expires: 2001-09-21
Abstract
Abstract A collagenous dressing which is characterized in that it contains collagen in combination with a resorbable biopolymer from the group comprising fibrinogen, gelatin modified by SH groups, collagen modified by SH groups, or regenerated oxycellulose modified by SH groups. Said collagenous dressing is tissue-agglutinable and does not have the disadvantages of conventional fibrin bonding in combination with resorbable collagen.
Inventors
- 👤 Axel Stemberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:55
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/32; A61L15/325; A61L15/225
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
42 words
A tissue-adherent collagenous dressing, comprising collagen present in combination with a resorbable biopolymer from the group consisting of fibrinogen, gelatin modified to contain reactive SH groups, collagen modified to contain reactive SH groups, and regenerated oxycellulose modified to contain reactive SH groups.
Claim 2
Dependent Claim
42 words
A tissue-adherent collagenous dressing, comprising collagen present in combination with a resorbable biopolymer from the group consisting of fibrinogen, gelatin modified to contain reactive SH groups, collagen modified to contain reactive SH groups, and regenerated oxycellulose modified to contain reactive SH groups.
Claim 3
Dependent Claim
14 words
A tissue-adherent collagenous dressing according to claim 1, further comprising a medicinally active agent.
Claim 4
Dependent Claim
16 words
A tissue-adherent collagenous dressing according to claim 2, wherein the medicinally active agent is an antibiotic.
Claim 5
Dependent Claim
13 words
A tissue-adherent collagenous dressing, according to claim 3, wherein the antibiotic is gentamycin.
Claim 6
Dependent Claim
22 words
A tissue-adherent collagenous dressing, according to one of the preceding claims, wherein the collagen is present in the form of a cloth.
Claim 7
Dependent Claim
23 words
A tissue-adherent collagenous dressing, according to one of claims 1 to 4, wherein the collagen is present in the form of a sponge.
Claim 8
Dependent Claim
23 words
A tissue-adherent collagenous dressing according to claim 1, wherein the purity of the collagen, expressed by the nitrogen-to-hydroxyproline ratio, is less than 4.
Claim 9
Dependent Claim
23 words
A tissue-adherent collagenous dressing according to claim 1, wherein the purity of the collagen, expressed by the nitrogen-to-hydroxyproline ratio, is less than 3.
Claim 10
Dependent Claim
13 words
A tissue-adherent collagenous dressing according to claim 1, wherein said biopolymer is fibrinogen.
Claim 11
Dependent Claim
19 words
A tissue-adherent collagenous dressing according to claim 1, wherein said biopolymer is gelatin modified to contain reactive SH groups.
Claim 12
Dependent Claim
18 words
A tissue-adherent collagenous dressing, comprising collagen present in combination with resorbable collagen modified to contain reactive SH groups.
Claim 13
Dependent Claim
18 words
A tissue-adherent collagenous dressing, comprising collagen present in combination with resorbable collagen modified to contain reactive SH groups.
Claim 14
Dependent Claim
19 words
A tissue-adherent collagenous dressing, comprising collagen present in combination with resorbable regenerated oxycellulose modified to contain reactive SH groups.
Claim 15
Dependent Claim
19 words
A tissue-adherent collagenous dressing, comprising collagen present in combination with resorbable regenerated oxycellulose modified to contain reactive SH groups.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |