US4089333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating a wound or burn
Assignee: Nippi Inc
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Filing: 1976-06-22
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Granted: 1978-05-16
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Expires: 1996-06-22
Abstract
Abstract Method of treating a wound or burn which comprises directly dressing its surface with non-woven fabric comprising staple fibers of spun, regenerated collagen substantially free of telopeptides is disclosed.
Inventors
- 👤 Akira Utsuo
- 👤 Katsumi Matsutomo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:48
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/32; A61L15/325; Y; Y10; Y10S; Y10S128/00; Y10S128/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
36 words
A method of treating a wound or burn which comprises directly dressing the surface of the wound or burn with a non-woven fabric essentially consisting of staple fibers of spun, regenerated collagen substantially free of telopeptides.
Claim 2
Independent Claim
36 words
A method of treating a wound or burn which comprises directly dressing the surface of the wound or burn with a non-woven fabric essentially consisting of staple fibers of spun, regenerated collagen substantially free of telopeptides.
Claim 3
Dependent Claim
36 words
A method according to claim 1 wherein said non-woven fabric further comprises a binder binding said staple fibers to one another, said binder being a member of the group consisting of solubilized collagen and denatured collagen.
Claim 4
Dependent Claim
36 words
A method according to claim 2 wherein said staple fibers have a length of 0.2 to 7.0 cm, and the amount of said binder is 2 to 20 percent of the weight of said staple fibers.
Claim 5
Dependent Claim
27 words
A method according to claim 1 wherein said fibers are tanned with a tanning agent selected from the group consisting of formaldehyde, glutaraldehyde and chromium tanning agent.
Claim 6
Dependent Claim
21 words
A method according to claim 1 wherein said fabric has a bulk density of 0.01 to 0.02 gram per cubic centimeter.
Claim 7
Dependent Claim
21 words
A method according to claim 1 wherein said fabric has a bulk density of 0.05 to 0.4 gram per cubic centimeter.
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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |