US4086331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gelatin-based compositions and a method for the generation of stabilized foams therefrom
Assignee: Technion Research and Development Foundation Ltd
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Filing: 1976-06-17
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Granted: 1978-04-25
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Expires: 1996-06-17
Abstract
Abstract A method for the generation of gelatin-based stabilized foams by passing a stream of air or other gas through a composition of the gelatin, an anionic surface-active agent and a water soluble ferrous salt. The resulting foams have a relatively long life term.
Inventors
- 👤 Peter Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:18
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/32; A01; A01N; A01N25/00; A01N25/16; A61K; A61K9/00; A61K9/10; A61K9/12; A61K9/122; Y; Y10; Y10S; Y10S424/00; Y10S424/13
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
94 words
A composition suitable for use in medicine and agriculture for the treating of burns or the coating of plants by the application thereto of a stable gelatin-based foam, comprising an aqueous solution of 0.1 to 3% by weight of gelatin; 0.01 to 0.2% by weight of an anionic surface active agent; an amount sufficient to stabilize said gelatin-based foam up to 1% by weight of a water soluble ferrous salt; and an amount sufficient of glutaraldehyde to maintain said composition in liquid state even after prolonged storage at low temperatures; said composition being non-toxic.
Claim 2
Dependent Claim
94 words
A composition suitable for use in medicine and agriculture for the treating of burns or the coating of plants by the application thereto of a stable gelatin-based foam, comprising an aqueous solution of 0.1 to 3% by weight of gelatin; 0.01 to 0.2% by weight of an anionic surface active agent; an amount sufficient to stabilize said gelatin-based foam up to 1% by weight of a water soluble ferrous salt; and an amount sufficient of glutaraldehyde to maintain said composition in liquid state even after prolonged storage at low temperatures; said composition being non-toxic.
Claim 3
Dependent Claim
18 words
A composition according to claim 1, wherein the water soluble ferrous salt is ferrous sulfate or ferrous chloride.
Claim 4
Dependent Claim
21 words
A composition according to claim 1, wherein the amount of iron incorporated is in the range of 200 to 800 ppm.
Claim 5
Dependent Claim
29 words
A composition according to claim 1, wherein the anionic surface active agent is selected from the group consisting of water-soluble salts of long-chain carboxylic acids, sulfonates and fluorocarbon surfactants.
Claim 6
Dependent Claim
20 words
A composition according to claim 1, wherein 1-15% by weight of a water-miscible organic solvent is incorporated into the composition.
Claim 7
Dependent Claim
23 words
A composition according to claim 5, wherein the water-miscible organic solvent is selected from the group consisting of methanol, ethanol n-propanol and isopropanol.
Claim 8
Dependent Claim
34 words
A composition according to claim 1, wherein an amount sufficient to cause a slow collapse of foam of a polyol selected from the groups consisting of glycol and glycerine is incorporated into the composition.
Claim 9
Dependent Claim
21 words
A composition in accordance with claim 1, wherein said glutaraldehyde is present in an amount of 0.01 to 0.4% by weight.
Claim 10
Dependent Claim
49 words
A medicinal composition in accordance wich claim 8, wherein said composition further contains an amount sufficient, to enhance evaporation of the water from said aqueous solution, of a water-miscible organic solvent selected from the group consisting of methanol, ethanol, n-propanol and isopropanol; and a bacterialcidal-effective amount of a bacteriacide.
Claim 11
Dependent Claim
27 words
An aerosol package for a generating gelatin-based foam for medical application comprising an aerosol container formulated with a suitable propellant and containing the composition of claim 9.
Claim 12
Dependent Claim
28 words
A method of treating burns comprising foaming the composition of claim 1 and applying said foam to the burned skin surface at a temperature of 5°- 30° C.
Claim 13
Dependent Claim
37 words
A method according to claim 11, wherein an amount sufficient to cause a slow collapse of foam of a polyol selected from the group consisting of glycol and glycerine is incorporated into the compositions prior to foaming.
Claim 14
Dependent Claim
22 words
A gelatin-based foam made by the method according to claim 11, having an expansion factor in the range of 5 to 280.
Claim 15
Dependent Claim
28 words
A method of treating burns comprising foaming the composition of claim 9 and applying said foam to the burned skin surface at a temperature of 5°- 30° C.
Claim 16
Dependent Claim
30 words
A gelatin-based foam applied as a surface coating to the skin, said foam being made by the method of claim 14 and having an expansion factor of 5 to 280.
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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) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |