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Patent US4412933A successfully refreshed from Google Patents.
US4412933A
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Color stabilized nonionic surfactants
Assignee: BASF SE
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Filing: 1981-04-17
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Granted: 1983-11-01
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Expires: 2001-04-17
Abstract
Abstract Color-stabilized nonionic surfactants which contain chemically bonded polyalkylene oxide groups having terminal hydroxyl groups, and in which are dissolved C 4 -C 8 -aliphatic dicarboxylic acids, their C 1 -C 4 -alkyl esters or mixtures thereof, as color stabilizers.
Inventors
- 👤 Erhard Klahr
- 👤 Wolfgang Trieselt
- 👤 Wolf-Dieter Balzer
- 👤 Rainer Strickler
- 👤 Dieter Stoeckigt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:33
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D1/72; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2082; C11D3/2093; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06; Y10S516/905; Y10S516/917; Y10S516/92
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
69 words
A color-stabilized nonionic surfactant composition consisting of a nonionic surfactant which contains chemically bonded polyalkylene oxide groups having terminal hydroxyl groups and in which is dissolved 0.1 to 5% by weight of a color stabilizing additive selected from the group consisting of C 1 -C 4 alkyl esters of C 4 -C 8 alkyl dicarboxylic acids, mixtures thereof, and a mixture of C 4 -C 8 alkyl dicarboxylic acids.
Claim 2
Dependent Claim
69 words
A color-stabilized nonionic surfactant composition consisting of a nonionic surfactant which contains chemically bonded polyalkylene oxide groups having terminal hydroxyl groups and in which is dissolved 0.1 to 5% by weight of a color stabilizing additive selected from the group consisting of C 1 -C 4 alkyl esters of C 4 -C 8 alkyl dicarboxylic acids, mixtures thereof, and a mixture of C 4 -C 8 alkyl dicarboxylic acids.
Claim 3
Dependent Claim
29 words
The color-stabilized nonionic surfactant of claim 1 wherein the color stabilizing additive is a C 1 -C 4 alkyl ester of a C 4 -C 8 alkyl dicarboxylic acid.
Claim 4
Dependent Claim
68 words
Cleaning agent formulation consisting essentially of from 70 to 99% by weight of inorganic alkaline builder and from 30 to 1% by weight of nonionic surfactant containing chemically bonded polyalkylene oxide groups having terminal hydroxyl groups, said surfactant containing dissolved 0.1 to 5%, based on nonionic surfactant, of C 4 -C 8 -aliphatic dicarboxylic acids, their C 1 -C 4 -alkyl esters or mixtures thereof, as color stabilizers.
Claim 5
Dependent Claim
68 words
Cleaning agent formulation consisting essentially of from 70 to 99% by weight of inorganic alkaline builder and from 30 to 1% by weight of nonionic surfactant containing chemically bonded polyalkylene oxide groups having terminal hydroxyl groups, said surfactant containing dissolved 0.1 to 5%, based on nonionic surfactant, of C 4 -C 8 -aliphatic dicarboxylic acids, their C 1 -C 4 -alkyl esters or mixtures thereof, as color stabilizers.
Claim 6
Dependent Claim
30 words
Cleaning agent formulation as claimed in claim 3 wherein the surfactant contains a mixture of succinic acid, glutaric acid and adipic acid, or a mixture of the corresponding methyl esters.
References Cited (Backward Citations)
US4092273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |