US4363760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partially hydrolyzed elastin from limed hide trimmings
Assignee: Seton Co
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Filing: 1981-08-27
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Granted: 1982-12-14
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Expires: 2001-08-27
Abstract
Abstract A method of preparing soluble partially hydrolyzed elastin is disclosed. The method involves treating insoluble elastin with a peroxide and subsequently partially hydrolyzing the treated elastin and recovering substantially pure soluble partially hydrolyzed elastin.
Inventors
- 👤 Gheorghe Cioca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:59
CPC Classifications
A; A23; A23J; A23J3/00; A23J3/30; A23J3/32; A23J3/34; A23J3/341; A23J3/342; A23J1/00; A23J1/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
27 words
A method of preparing soluble partially hydrolyzed elastin comprising: treating insoluble elastin with ammonium persulfate; partially hydrolyzing the elastin; and recovering substantially pure soluble partially hydrolyzed elastin.
Claim 2
Independent Claim
27 words
A method of preparing soluble partially hydrolyzed elastin comprising: treating insoluble elastin with ammonium persulfate; partially hydrolyzing the elastin; and recovering substantially pure soluble partially hydrolyzed elastin.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein including treating the insoluble elastin with hydrogen peroxide.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein said ammonium persulfate is present at a level of about 0.025 to 0.5 percent by weight based on the weight of insoluble elastin.
Claim 5
Dependent Claim
29 words
The method of claim 3 wherein said ammonium persulfate is present at a level of about 0.1 to 0.25 percent by weight based upon the weight of insoluble elastin.
Claim 6
Dependent Claim
22 words
The method of claim 1 wherein said insoluble elastin is treated with peroxide in an aqueous solution at reflux and ambient pressure.
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein said treated elastin is hydrolyzed by heating in the presence of acid.
Claim 8
Dependent Claim
11 words
The method of claim 6 wherein said acid is aqueous acid.
Claim 9
Dependent Claim
10 words
The method of claim 7 wherein said acid is HCL.
Claim 10
Dependent Claim
18 words
The method of claim 7 wherein said treated elastin is hydrolyzed by heating at reflux and ambient pressure.
Claim 11
Dependent Claim
18 words
The method of claim 8 wherein said partially hydrolyzed elastin has a molecular weight of 500 to 1000.
Claim 12
Dependent Claim
14 words
The method of claim 1 wherein said partially hydrolyzed elastin contains desmosine and isodesmosine.
Claim 13
Independent Claim
115 words
A method of preparing partially hydrolyzed soluble elastin from fibrous protein containing material comprised of insoluble elastin and collagen comprising: treating the fibrous protein containing material with an aqueous solution of a member selected from the group consisting of an alkali earth metal hydroxide and mixtures thereof in the presence of an agent which prevents overswelling of the fibrous protein, said treatment removing substantially all of the hair and fat from the fibrous protein; hydrolyzing the polypeptide chains of the collagen to form oligopeptides; separating the oligopeptides formed of the collagen from the insoluble elastin; treating the insoluble elastin with ammonium persulfate; partially hydrolyzing the treated elastin; and recovering substantially pure partially hydrolyzed soluble elastin.
Claim 14
Independent Claim
115 words
A method of preparing partially hydrolyzed soluble elastin from fibrous protein containing material comprised of insoluble elastin and collagen comprising: treating the fibrous protein containing material with an aqueous solution of a member selected from the group consisting of an alkali earth metal hydroxide and mixtures thereof in the presence of an agent which prevents overswelling of the fibrous protein, said treatment removing substantially all of the hair and fat from the fibrous protein; hydrolyzing the polypeptide chains of the collagen to form oligopeptides; separating the oligopeptides formed of the collagen from the insoluble elastin; treating the insoluble elastin with ammonium persulfate; partially hydrolyzing the treated elastin; and recovering substantially pure partially hydrolyzed soluble elastin.
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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) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |