Patent US4569784A successfully refreshed from Google Patents.
US4569784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a gel having gas transporting capability
Assignee: Affinity Biotech Inc
•
Filing: 1981-10-20
•
Granted: 1986-02-11
•
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 15:52
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.
References Cited (Backward Citations)
US3277013A
Cited
US3823091A
Cited
US3850753A
Cited
US3778381A
Cited
US3911138A
Cited
US3911138B1
Cited
US3993581A
Cited
US4105798A
Cited
US4166006A
Cited
US4366169A
Cited
US4299728A
Cited
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 |