Patent US4231904A successfully refreshed from Google Patents.
US4231904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent bars with improved properties
Assignee: Lever Brothers Co
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Filing: 1979-02-26
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Granted: 1980-11-04
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Expires: 1999-02-26
Abstract
Abstract Detergent bars containing acyl isethionates can exhibit a feeling of drag (relatively high friction) when handled during washing. The drag can be reduced, and therefore the slip feeling of the bar improved, by adding an ethosylated sorbitan ester. Preferably the amount of ester is from about 5% to about 30% by weight of the bar.
Inventors
- 👤 David Machin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:27
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/12; C11D1/28; C11D1/66; C11D1/662; C11D17/00; C11D17/0047; C11D17/006
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
A detergent bar containing from about 20% to about 70% by weight of water soluble salts of acyl (C 8 to C 22 ) isethionates and an amount of ethoxylated (about 1 to about 30 units) sorbitan ester, having from about 12 to about 22 carbon atoms in the acid derived portion effective to increase the slip properties of the bar.
Claim 2
Dependent Claim
61 words
A detergent bar containing from about 20% to about 70% by weight of water soluble salts of acyl (C 8 to C 22 ) isethionates and an amount of ethoxylated (about 1 to about 30 units) sorbitan ester, having from about 12 to about 22 carbon atoms in the acid derived portion effective to increase the slip properties of the bar.
Claim 3
Dependent Claim
20 words
A detergent bar according to claim 1 containing from about 5% to about 30% by weight of ethoxylated sorbitan ester.
Claim 4
Dependent Claim
18 words
A detergent bar according to claim 1 or 2 containing above about 30% by weight of acyl isethionate.
Claim 5
Dependent Claim
16 words
A detergent bar according to claim 3 containing below about 60% by weight of acyl isethionate.
Claim 6
Dependent Claim
17 words
A detergent bar according to claim 1 containing above about 10% by weight of ethoxylated sorbitan ester.
Claim 7
Dependent Claim
17 words
A detergent bar according to claim 5 containing below about 25% by weight of ethoxylated sorbitan ester.
Claim 8
Dependent Claim
27 words
A detergent bar according to claim 1 wherein the alkyl or alkenyl group of the ethoxylated sorbitan ester contains from about 16 to about 18 carbon atoms.
Claim 9
Dependent Claim
20 words
A detergent bar according to claim 1 wherein the ethoxylated sorbitan ester contains above about 4 units of ethylene oxide.
Claim 10
Dependent Claim
20 words
A detergent bar according to claim 8 wherein the ethoxylated sorbitan ester contains below about 20 units of ethylene oxide.
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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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |