Patent US4413518A successfully refreshed from Google Patents.
Patent US4390519A successfully refreshed from Google Patents.
US4390519A
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US
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Bandage with hemostatic agent and methods for preparing and employing the same
Assignee: SUPERSTAT Corp
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Filing: 1980-09-02
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Granted: 1983-06-28
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Expires: 2000-09-02
Abstract
Abstract An improved hemostatic article is made by combining collagen or a collagen-like substance with a pad or sponge. The thusly modified pad or sponge is employed to control or terminate bleeding.
Inventors
- 👤 Philip N. Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:01
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/78; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/32; A61L15/325; A61K; A61K38/00; A61L2400/00; A61L2400/04; Y; Y10; Y10S; Y10S128/00; Y10S128/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
A method comprising modifying one of the group consisting of a water soluble collagen substance or a water soluble collagen-like substance by dissolving the substance in water and modifying the thusly dissolved substance to render the surface charge thereof effectively more positive than prior to modification while retaining the water solubility of the substance, and freezing and drying the thusly modified substance in a bandage.
Claim 2
Independent Claim
65 words
A method comprising modifying one of the group consisting of a water soluble collagen substance or a water soluble collagen-like substance by dissolving the substance in water and modifying the thusly dissolved substance to render the surface charge thereof effectively more positive than prior to modification while retaining the water solubility of the substance, and freezing and drying the thusly modified substance in a bandage.
Claim 3
Dependent Claim
15 words
A method as claimed in claim 1 wherein the substance is modified by covalent modification.
Claim 4
Dependent Claim
12 words
A method as claimed in claim 2 wherein the substance is lyophilized.
Claim 5
Dependent Claim
9 words
A hemostatic article prepared as claimed in claim 1.
Claim 6
Dependent Claim
9 words
A hemostatic article prepared as claimed in claim 3.
Claim 7
Dependent Claim
19 words
A method as claimed in claim 3 wherein the substance is gelatin which is treated with NH 4 Cl.
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) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |