US5064941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collagen extracted from collagen-containing tissue
Assignee: Boston Biomedical Research Institute
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Filing: 1990-09-26
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Granted: 1991-11-12
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Expires: 2010-09-26
Abstract
Abstract A method for extracting collagen from animal collagen-containing tissue using a solution of an organic diamine or amino-alcohol salt. The collagen product has many uses such as cell growth matrices, prosthetic devices, synthetic skin, dressings for wounds, or membranes.
Inventors
- 👤 Peter F. Davison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:45
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/78
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
38 words
A prosthetic device comprising collagen produced by contacting animal collagen-containing tissue with a solution of an organic amine salt, under conditions whereby collagen is extracted, said organic amine being selected from the group consisting of diamines and aminoalcohols.
Claim 2
Dependent Claim
38 words
A prosthetic device comprising collagen produced by contacting animal collagen-containing tissue with a solution of an organic amine salt, under conditions whereby collagen is extracted, said organic amine being selected from the group consisting of diamines and aminoalcohols.
Claim 3
Dependent Claim
40 words
A cell growth support matrix comprising collagen produced by contacting animal collagen-containing tissue with a solution of an organic amine salt, under conditions whereby collagen is extracted, said organic amine being selected from the group consisting of diamines and aminoalcohols.
Claim 4
Dependent Claim
40 words
A cell growth support matrix comprising collagen produced by contacting animal collagen-containing tissue with a solution of an organic amine salt, under conditions whereby collagen is extracted, said organic amine being selected from the group consisting of diamines and aminoalcohols.
Claim 5
Dependent Claim
37 words
Synthetic skin comprising collagen produced by contacting animal collagen-containing tissue with a solution of an organic amine salt, under conditions whereby collagen is extracted, said organic amine being selected from the group consisting of diamines and aminoalcohols.
Claim 6
Dependent Claim
37 words
Synthetic skin comprising collagen produced by contacting animal collagen-containing tissue with a solution of an organic amine salt, under conditions whereby collagen is extracted, said organic amine being selected from the group consisting of diamines and aminoalcohols.
Claim 7
Dependent Claim
36 words
Membranes comprising collagen produced by contacting animal collagen-containing tissue with a solution of an organic amine salt, under conditions whereby collagen is extracted, said organic amine being selected from the group consisting of diamines and aminoalcohols.
Claim 8
Dependent Claim
36 words
Membranes comprising collagen produced by contacting animal collagen-containing tissue with a solution of an organic amine salt, under conditions whereby collagen is extracted, said organic amine being selected from the group consisting of diamines and aminoalcohols.
References Cited (Backward Citations)
US4983721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |