US4357274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of sclero protein transplants with increased biological stability
Assignee: B Braun Surgical AG
•
Filing: 1981-08-06
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Granted: 1982-11-02
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Expires: 2001-08-06
Abstract
Abstract In a process for the manufacture of sclero protein transplants in which raw sclero protein from humans or animals is watered, treated with H2O2, degreased, rinsed, dried and sterilized, the improvement in which the sclero protein, after rinsing and prior to drying, is treated with glycerin or polyethylene glycol.
Inventors
- 👤 Heinz-Helmut Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:58
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/36; A61L27/3683; A61L27/3687; A01; A01N; A01N1/00; A01N1/10; A01N1/12; A01N1/122; A01N1/125; Y; Y10; Y10S; Y10S128/00; Y10S128/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
53 words
In a process for the manufacture of sclero protein transplants in which raw sclero protein from humans or animals is watered, treated with H 2 O 2 , degreased, rinsed, dried and sterilized, the improvement in which the sclero protein, after rinsing and prior to drying, is treated with glycerin or polyethylene glycol.
Claim 2
Dependent Claim
53 words
In a process for the manufacture of sclero protein transplants in which raw sclero protein from humans or animals is watered, treated with H 2 O 2 , degreased, rinsed, dried and sterilized, the improvement in which the sclero protein, after rinsing and prior to drying, is treated with glycerin or polyethylene glycol.
Claim 3
Dependent Claim
19 words
The improved process according to claim 1 in which a 5% to 50% glycerin solution in water is used.
Claim 4
Dependent Claim
22 words
The improved process according to claim 1 in which polyethylene glycol having a molecular weight of about 400 to 2000 is used.
Claim 5
Dependent Claim
22 words
The improved process according to claim 1 or 3 in which a 5% to 50% polyethylene glycol solution in water is used.
Claim 6
Dependent Claim
28 words
The improved process according to any one of claims 1 to 3 in which the sclero protein used is collagen, keratin or elastin from humans or from animals.
Claim 7
Dependent Claim
22 words
The improved process according to any one of claims 1 to 3 in which the sclero protein used is dura from humans.
Claim 8
Dependent Claim
19 words
The improved process according to claim 6 in which a 20% to 40% glycerin solution in water is used.
Claim 9
Dependent Claim
17 words
The improved process according to claim 7 in which a 30% glycerin solution in water is used.
References Cited (Backward Citations)
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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) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |