US4569784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a gel having gas transporting capability
Assignee: Affinity Biotech Inc
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Filing: 1981-10-20
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Granted: 1986-02-11
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Expires: 2001-10-20
Abstract
Abstract An inert, water-immiscible inert organic liquid having gas transport properties, water and a suitable emulsifying agent are formed into a stable gel by emulsifying a mixture of the same, concentrating the emulsion to form a gel phase and a liquid phase, and separating the two phases. The resulting gel can be used as an ointment or cosmetic for skin irritations or wounds, or as a coating in industrial applications where extended contact of a surface with a gas, such as oxygen, is desired. Fluorocarbons or low viscosity silicone oils are suitable organic liquid components of the gels.
Inventors
- 👤 Robert E. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:09
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0019; A61K9/0026; A61K8/00; A61K8/02; A61K8/04; A61K8/042; A61K8/18; A61K8/19; A61K8/22; A61K8/30; A61K8/69; A61K8/70; A61K9/06; A61L; A61L26/00; A61L26/0009; A61L26/0014; A61L26/0019; A61Q; A61Q19/00; C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C09; C09K; C09K3/00; C09K3/30; C08J2383/00; C08J2383/04; Y; Y10; Y10S; Y10S516/00; Y10S516/902
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
63 words
A method for preparing a gel, comprising: (a) admixing an inert, water-immiscible organic liquid having gas transporting capability, water, and an emulsifying agent under conditions of agitation and in proportions effective to form an emulsion; (b) concentrating the emulsion to form a gel phase and a liquid phase; and (c) separating all or a portion of the liquid phase from the gel phase.
Claim 2
Independent Claim
63 words
A method for preparing a gel, comprising: (a) admixing an inert, water-immiscible organic liquid having gas transporting capability, water, and an emulsifying agent under conditions of agitation and in proportions effective to form an emulsion; (b) concentrating the emulsion to form a gel phase and a liquid phase; and (c) separating all or a portion of the liquid phase from the gel phase.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein the organic liquid is a fluorocarbon or a low viscosity silicone oil.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein the concentrating and separation steps are effected sequentially.
Claim 5
Dependent Claim
13 words
The method of claim 3 wherein the concentrating step is effected by centrifugation.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein the concentrating and separating steps are effected simultaneously.
Claim 7
Dependent Claim
20 words
The method of claim 5 wherein the concentrating and separation steps are effected by passing the emulsion through a microfilter.
Claim 8
Dependent Claim
20 words
The method of claim 1 wherein an antimicrobial agent is incorporated into the gel during or after the formation thereof.
Claim 9
Dependent Claim
20 words
The method of claim 1 wherein oxygen is introduced into the organic liquid prior to the completion of step (c).
Claim 10
Dependent Claim
19 words
The method of claim 1 wherein oxygen is introduced into the gel after separation of the liquid phase therefrom.
Claim 11
Dependent Claim
12 words
The method of claim 1 wherein the organic liquid is a fluorocarbon.
Claim 12
Dependent Claim
11 words
The method of claim 10 wherein the fluorocarbon is a perfluorocarbon.
Claim 13
Dependent Claim
15 words
The method of claim 1 wherein the organic liquid is a low viscosity silicone oil.
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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) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |