US4000093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl sulfate detergent compositions
Assignee: Procter and Gamble Co
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Filing: 1975-04-02
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Granted: 1976-12-28
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Expires: 1995-04-02
Abstract
Abstract Cellulose-based soil release ethers are used in detergent compositions containing C 10 -C 13 alkyl sulfate surfactants, and substantially free from interfering amounts of longer-chain length alkyl sulfates, to provide optimal soil release performance.
Inventors
- 👤 Charles Henry Nicol
- 👤 Michael Eugene Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:45
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0036; C11D1/00; C11D1/02; C11D1/12; C11D1/14; C11D1/146; C11D1/22; C11D3/16; C11D3/20; C11D3/22; C11D3/222; C11D3/225
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
165 words
A detergent composition comprising: a. from about 5% to about 50% by weight of a surfactant component consisting essentially of a water-soluble alkyl sulfate wherein the alkyl substituent has a chain length in the range of C 10 -C 13 , or mixtures thereof, said surfactant component containing less than about 5% by weight of C 15 and higher alkyl sulfates; b. from about 1% to about 5% by weight of a water-soluble alkyl sulfate wherein the alkyl substituent is C 14 ; c. from about 0.1% to about 3% by weight of a soil release ether component selected from the group consisting of alkyl cellulose ethers, hydroxyalkyl cellulose ethers and hydroxyalkyl alkyl cellulose ethers; d. from about 0% to about 70% by weight of a detergency builder component; and e. the balance of the composition comprising detergency adjunct materials and carriers selected from the group consisting of perfumes, optical bleaches, fillers, anti-caking agents, fabric softeners, perborate bleaches, enzymes, water, water-alcohol mixtures and mixtures thereof.
Claim 2
Dependent Claim
165 words
A detergent composition comprising: a. from about 5% to about 50% by weight of a surfactant component consisting essentially of a water-soluble alkyl sulfate wherein the alkyl substituent has a chain length in the range of C 10 -C 13 , or mixtures thereof, said surfactant component containing less than about 5% by weight of C 15 and higher alkyl sulfates; b. from about 1% to about 5% by weight of a water-soluble alkyl sulfate wherein the alkyl substituent is C 14 ; c. from about 0.1% to about 3% by weight of a soil release ether component selected from the group consisting of alkyl cellulose ethers, hydroxyalkyl cellulose ethers and hydroxyalkyl alkyl cellulose ethers; d. from about 0% to about 70% by weight of a detergency builder component; and e. the balance of the composition comprising detergency adjunct materials and carriers selected from the group consisting of perfumes, optical bleaches, fillers, anti-caking agents, fabric softeners, perborate bleaches, enzymes, water, water-alcohol mixtures and mixtures thereof.
Claim 3
Dependent Claim
27 words
A composition according to claim 1 characterized by a weight ratio of surfactant component:soil release ether component in the range of from about 5:1 to about 100:1.
Claim 4
Dependent Claim
34 words
A composition according to claim 2 wherein the surfactant component is selected from the group consisting of the alkali metal, ammonium and alkanolammonium salts of C 10 -C 13 alkyl sulfates, and mixtures thereof.
Claim 5
Dependent Claim
16 words
A composition according to claim 3 wherein the surfactant component is in the sodium salt form.
Claim 6
Dependent Claim
28 words
A composition according to claim 2 wherein the soil release ether component is an alkyl cellulose ether having a DS alkyl of from about 1.7 to about 3.0.
Claim 7
Dependent Claim
36 words
A composition according to claim 2 wherein the alkyl cellulose ether is selected from the group consisting of methyl, ethyl, propyl and butyl cellulose ethers having a DS alkyl of from about 1.2 to about 2.9.
Claim 8
Dependent Claim
30 words
A composition according to claim 6 wherein the alkyl cellulose ether is a methyl cellulose ether characterized by a DS methyl in the range from about 2.0 to about 2.7.
Claim 9
Dependent Claim
28 words
A composition according to claim 2 wherein the soil release ether component is a hydroxyalkyl cellulose ether having a DS hydroxyalkyl of from about 1.2 to about 2.9.
Claim 10
Dependent Claim
35 words
A composition according to claim 8 wherein the hydroxyalkyl cellulose ether is selected from the group consisting of hydroxyethyl, hydroxypropyl and hydroxybutyl cellulose ethers having a DS hydroxyalkyl of from about 1.3 to about 1.7.
Claim 11
Dependent Claim
36 words
A composition according to claim 2 wherein the soil release ether component is a hydroxyalkyl alkyl cellulose ether having a DS hydroxyalkyl of at least about 0.01 and a DS alkyl of at least about 1.0.
Claim 12
Dependent Claim
60 words
A composition according to claim 10 wherein the hydroxyalkyl substituent in the hydroxyalkyl alkyl cellulose ether is independently selected from the group consisting of hydroxyethyl, hydroxypropyl and hydroxybutyl wherein the DS hydroxyalkyl is at least about 0.05 and wherein the alkyl substituent is independently selected from methyl, ethyl, propyl and butyl wherein the DS alkyl is at least about 1.0.
Claim 13
Dependent Claim
42 words
A composition according to claim 10 wherein the hydroxyalkyl alkyl cellulose ether is characterized by a DS alkyl in the range of from about 1.7 to about 2.7 and a DS hydroxyalkyl in the range of from about 0.01 to about 1.0.
Claim 14
Dependent Claim
32 words
A composition according to claim 12 wherein the DS alkyl of the cellulose ether is from about 1.8 to about 2.2 and the DS hydroxyalkyl is from about 0.06 to about 1.0.
Claim 15
Dependent Claim
22 words
A granular detergent composition according to claim 2 comprising from about 15% to about 65% by weight of a water-soluble detergency builder.
Claim 16
Dependent Claim
14 words
A composition according to claim 14 wherein the builder is an inorganic detergency builder.
Claim 17
Dependent Claim
13 words
A composition according to claim 15 wherein the inorganic builder is sodium tripolyphosphate.
Claim 18
Dependent Claim
14 words
A composition according to claim 16 wherein the builder is an organic detergency builder.
Claim 19
Dependent Claim
13 words
A composition according to claim 17 wherein the organic builder is sodium nitrilotriacetate.
Claim 20
Dependent Claim
14 words
A composition according to claim 2 wherein the detergency builder is a seeded builder.
Claim 21
Dependent Claim
35 words
A composition according to claim 19 wherein the seeded builder comprises a 30:1 to 5:1 weight mixture of sodium carbonate and particulate calcium carbonate having an average particle diameter from 0.01 microns to 5 microns.
Claim 22
Dependent Claim
13 words
A composition according to claim 2 wherein the detergency builder is substantially water-insoluble.
Claim 23
Dependent Claim
14 words
A composition according to claim 21 wherein the detergency builder is a zeolite-type material.
Claim 24
Dependent Claim
23 words
A composition according to claim 2, said composition comprising from about 0.5% to about 1.5% by weight of the soil release ether component.
Claim 25
Dependent Claim
17 words
A composition according to claim 5 wherein the DS alkyl is from about 1.7 to about 2.7.
Claim 26
Dependent Claim
30 words
A composition according to claim 24 wherein the alkyl cellulose ether is a methyl cellulose ether characterized by a DS methyl in a range from about 1.8 to about 2.2.
Claim 27
Dependent Claim
38 words
A composition according to claim 13 wherein the hydroxyalkyl alkyl cellulose ether is a methyl hydroxybutyl cellulose characterized by a DS methyl in a range from about 1.8 to about 2.2 and a DS hydroxybutyl of about 0.08.
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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |