Patent US4537709A successfully refreshed from Google Patents.
US4537709A
Expired / Lapsed
US
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Liquid detergent composition comprising selected alkylbenzene sulphonates and alkyl ether sulphates
Assignee: Lever Brothers Co
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Filing: 1983-11-14
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Granted: 1985-08-27
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Expires: 2003-11-14
Abstract
Abstract In light-duty liquid detergent compositions suitable for hand dishwashing, improved foaming performance, especially in hard water, is obtained by using combinations of particular alkylbenzene sulphonates (linear C10-C13 alkylbenzene sulphonates substantially free of other alkyl chain lengths and containing only minor amounts of C13 material) and particular alkyl ether sulphates (those containing 20% or less of C14 and above material and having an average degree of ethoxylation of from 1 to 12).
Inventors
- 👤 David J. Edge
- 👤 Appaya R. Naik
- 👤 Melvin Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:02
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0094; C11D1/00; C11D1/02; C11D1/12; C11D1/22; C11D1/29; C11D1/37
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
158 words
A foaming liquid detergent composition in the form of a stable aqueous solution containing from 2 to 60% by weight of an active detergent mixture comprising (a) a linear C 10 -C 13 alkylbenzene sulphonate substantially free of material of other alkyl chain length and having a C 13 content not exceeding 15% by weight if its 2-phenyl isomer content is 30% by weight or more, or not exceeding 30% by weight if its 2-phenyl isomer content is less than 30% by weight, and (b) a C 10 -C 18 primary alkyl ether sulphate containing 20% by weight or less of C 14 and above chain length material and having an average degree of ethoxylation of from 1 to 12, the weight ratio of (a) to (b) being within the range of from 8:1 to 0.5:1, and the composition being substantially free from alkylbenzene sulphonates and alkyl ether sulphates other than those defined under (a) and (b) above.
Claim 2
Dependent Claim
158 words
A foaming liquid detergent composition in the form of a stable aqueous solution containing from 2 to 60% by weight of an active detergent mixture comprising (a) a linear C 10 -C 13 alkylbenzene sulphonate substantially free of material of other alkyl chain length and having a C 13 content not exceeding 15% by weight if its 2-phenyl isomer content is 30% by weight or more, or not exceeding 30% by weight if its 2-phenyl isomer content is less than 30% by weight, and (b) a C 10 -C 18 primary alkyl ether sulphate containing 20% by weight or less of C 14 and above chain length material and having an average degree of ethoxylation of from 1 to 12, the weight ratio of (a) to (b) being within the range of from 8:1 to 0.5:1, and the composition being substantially free from alkylbenzene sulphonates and alkyl ether sulphates other than those defined under (a) and (b) above.
Claim 3
Dependent Claim
38 words
The detergent composition of claim 1, wherein component (a) is a linear C 10 -C 13 alkylbenzene sulphonate substantially free of material of other alkyl chain lengths and having a C 13 content not exceeding 15% by weight.
Claim 4
Dependent Claim
42 words
The detergent composition of claim 1, wherein the linear alkylbenzene sulphonate (a) is derived from a linear C 10 -C 13 alkylbenzene having an average molecular weight of from 234 to 245 and a dialkyl tetralin content not exceeding 5% by weight.
Claim 5
Dependent Claim
27 words
The detergent composition of claim 1, wherein the alkyl ether sulphate (b) contains 10% by weight or less of material of C 14 and above chain length.
Claim 6
Dependent Claim
24 words
The detergent composition of claim 4, wherein the alkyl ether sulphate (b) is substantially free of material of C 14 and above chain length.
Claim 7
Dependent Claim
23 words
The detergent composition of claim 1, wherein the alkyl ether sulphate (b) has an average degree of ethoxylation of from 1 to 8.
Claim 8
Dependent Claim
22 words
The detergent composition of claim 6, wherein the alkyl ether sulphate (b) has an average degree of ethoxylation of 2 or 3.
Claim 9
Dependent Claim
22 words
The detergent composition of claim 1, wherein the alkyl ether sulphate (b) is derived from straight-chain or predominantly straight chain aliphatic alcohols.
Claim 10
Dependent Claim
17 words
The detergent composition of claim 1, which contains from 5 to 40% of the active detergent mixture.
Claim 11
Dependent Claim
17 words
The detergent composition of claim 9, which contains from 15 to 40% of the active detergent mixture.
Claim 12
Dependent Claim
23 words
The detergent composition of claim 1, wherein the weight ratio of (a) to (b) is within the range of from 6:1 to 1:1.
Claim 13
Dependent Claim
23 words
The detergent composition of claim 11, wherein the weight ratio of (a) to (b) is within the range of from 2.5:1 to 1:1.
Claim 14
Dependent Claim
16 words
The detergent composition of claim 1, which contains at least 10% by weight of component (a).
Claim 15
Dependent Claim
16 words
The detergent composition of claim 1, which contains at least 5% by weight of component (b).
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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) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |