US4276281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burn treatment
Assignee: Individual
•
Filing: 1980-09-04
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Granted: 1981-06-30
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Expires: 2000-09-04
Abstract
Abstract Eschar is removed from mammalian skin burns by application of elastase to promote healing of the burned area by hastening the removal of the burn eschar. The elastase solution preferably comprises purified elastase in tris hydroxymethyl aminoethane buffer at about pH 8.8. The elastase ointment comprises purified elastase in acrylic acid polymer at pH of about 8.5 to 8.8.
Inventors
- 👤 George F. Crikelair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
A; A61; A61K; A61K38/00; A61K38/16; A61K38/43; A61K38/46; A61K38/48; A61K38/482; A61K38/486; A61K47/00; A61K47/30; A61K47/32; A61K9/00; A61K9/0012; A61K9/0014; A61L; A61L15/00; A61L15/16; A61L15/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
A method of treating burned mammalian tissue which comprises contacting the burned tissue with elastase in a concentration effective to substantially digest the burn eschar.
Claim 2
Independent Claim
25 words
A method of treating burned mammalian tissue which comprises contacting the burned tissue with elastase in a concentration effective to substantially digest the burn eschar.
Claim 3
Independent Claim
32 words
A method of debriding an animal burn without substantial injury to adjacent living tissue which comprises contacting the burned tissue with elastase in a concentration effective to substantially digest the burn eschar.
Claim 4
Independent Claim
32 words
A method of debriding an animal burn without substantial injury to adjacent living tissue which comprises contacting the burned tissue with elastase in a concentration effective to substantially digest the burn eschar.
References Cited (Backward Citations)
US3864477A
Cited
US4122158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |