US4536324A
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Nonionic surfactant type vesicle dispersion
Assignee: Lion Corp
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Filing: 1983-07-18
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Granted: 1985-08-20
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Expires: 2003-07-18
Abstract
Abstract A nonionic surfactant type vesicle dispersion comprising vesicles, dispersed in an aqueous medium, composed of (A) 100 parts by weight of at least one ethoxylate selected from the group consisting of polyoxyethylene castor oil ethers and polyoxyethylene hardened castor oil ethers and (B) 3 to 30 parts by weight of sorbitan polyesters of long-chain fatty acids. This nonionic surfactant type vesicle dispersion can include a hydrophilic or hydrophobic effective component in a state isolated from an aqueous medium.
Inventors
- 👤 Masami Fujiwara
- 👤 Hidenori Fukuda
- 👤 Minako Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:50
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K8/00; A61K8/02; A61K8/14; A61K8/18; A61K8/30; A61K8/49; A61K8/4973; A61K8/92; A61K8/922; A61K9/00; A61K9/10; A61K9/127; A61K9/1271; A61K9/1272; Y; Y10; Y10S; Y10S516/00; Y10S516/90; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A nonionic surfactant type vesicle dispersion comprising vesicles, dispersed in an aqueous medium, composed of (A) 100 parts by weight of at least one ethoxylate selected from the group consisting of polyoxyethylene castor oil ethers and polyoxethylene hardened castor oil ethers having an average ethylene oxide addition mole number of 7 to 20 and (B) 3 to 30 parts by weight of sorbitan polyesters of long-chain fatty acids having 14 to 18 carbon atoms, and having the esterification degree of 2.5 to 3.5, wherein the total amount of components (A) and (B) is about 0.1% to 50% by weight based on the total weight of the dispersion.
Claim 2
Dependent Claim
107 words
A nonionic surfactant type vesicle dispersion comprising vesicles, dispersed in an aqueous medium, composed of (A) 100 parts by weight of at least one ethoxylate selected from the group consisting of polyoxyethylene castor oil ethers and polyoxethylene hardened castor oil ethers having an average ethylene oxide addition mole number of 7 to 20 and (B) 3 to 30 parts by weight of sorbitan polyesters of long-chain fatty acids having 14 to 18 carbon atoms, and having the esterification degree of 2.5 to 3.5, wherein the total amount of components (A) and (B) is about 0.1% to 50% by weight based on the total weight of the dispersion.
Claim 3
Dependent Claim
25 words
A vesicle dispersion as claimed in claim 1, wherein said sorbitan polyesters are sorbitan polyesters of long-chain fatty acids having 16 to 18 carbon atoms.
Claim 4
Dependent Claim
22 words
A vesicle dispersion as claimed in claim 1, wherein the weight ratio of component (A) to component (B) is 100:5 to 100:25.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |