US5019174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removing oil from surfaces with liposomal cleaner
Assignee: Novavax Inc
•
Filing: 1989-09-21
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Granted: 1991-05-28
•
Expires: 2009-09-21
Abstract
Abstract The present invention concerns a lipid vesicle skin cleaner which is exceptionally effective at removing oily dirt from hands or the face. The same type of cleaner can also be used to remove dirt from other surfaces. The cleaner works by encapsulating the oil under gentle agitation conditions.
Inventors
- 👤 Donald F. H. Wallach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:22
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/10; A61K9/127; A61K8/00; A61K8/02; A61K8/14; A61K9/1271; A61K9/1272; A61K9/1277; A61Q; A61Q19/00; A61Q19/10; C; C11; C11D; C11D17/00; C11D17/0008; C11D17/0017; C11D17/0021; C11D17/0026; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A method of removing oil from a surface comprising the steps of: A. Providing paucilamellar lipid vesicles having 2-10 lipid bilayers surrounding a large, substantially aqueous filled amorphous center, said paucilamellar lipid vesicles having a lipid selected from the group consisting of polyoxyethylene fatty acid ethers, polyoxyethylene fatty acid esters, diethanolamides, polyoxyethylene glyceryl mono- and tristearates and oleates, and betaines as the primary structural lipid in the bilayers; B. Introducing said paucilamellar vesicles to said surface; C. Agitating said paucilamellar lipid vesicles on said surface with sufficient force such that at least a portion of said paucilamellar vesicles are broken and reform under said agitation, whereby said reformed vesicles encapsulate said oil; and D. Removing said vesicles containing said encapsulated oil from said surface.
Claim 2
Independent Claim
124 words
A method of removing oil from a surface comprising the steps of: A. Providing paucilamellar lipid vesicles having 2-10 lipid bilayers surrounding a large, substantially aqueous filled amorphous center, said paucilamellar lipid vesicles having a lipid selected from the group consisting of polyoxyethylene fatty acid ethers, polyoxyethylene fatty acid esters, diethanolamides, polyoxyethylene glyceryl mono- and tristearates and oleates, and betaines as the primary structural lipid in the bilayers; B. Introducing said paucilamellar vesicles to said surface; C. Agitating said paucilamellar lipid vesicles on said surface with sufficient force such that at least a portion of said paucilamellar vesicles are broken and reform under said agitation, whereby said reformed vesicles encapsulate said oil; and D. Removing said vesicles containing said encapsulated oil from said surface.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein said surface comprises mammalian skin, said agitation step comprises rubbing, and said removal step comprises applying an aqueous solvent.
Claim 4
Dependent Claim
15 words
The method of claim 2 wherein said removal step comprises washing said skin with water.
Claim 5
Dependent Claim
25 words
The method of claim 2 wherein said removal step comprises applying said aqueous solvent by wiping said skin with a material containing said aqueous solvent.
Claim 6
Dependent Claim
12 words
The method of claim 2 wherein said mammalian skin comprises human skin.
Claim 7
Dependent Claim
15 words
The method of claim 1, wherein said paucilamellar lipid vesicles further comprise an encapsulated cleanser.
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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) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |