US4299717A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent compositions
Assignee: Lever Brothers Co
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Filing: 1980-03-03
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Granted: 1981-11-10
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Expires: 2000-03-03
Abstract
Abstract The invention relates to a detergent composition in powder or bar form containing a surfactant, an alkali metal carbonate and a low level (1 to 12%) of pyrophosphate, other phosphates being maintained at a level below 5%. A peroxygen bleach and other conventional additives are optionally present. The compositions are suitable for washing fabrics in developing countries and are suitable for low cost products elsewhere.
Inventors
- 👤 John S. Cottrell
- 👤 Peter J. Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:22
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/10; C11D3/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
An alkaline detergent composition for fabric washing containing: (i) from about 10% to about 40% of a synthetic detergent surfactant selected from the group consisting of anionic, nonionic, amphoteric zwitterionic detergent surfactant and mixtures thereof; (ii) from about 10% to less than about 40% of an alkali metal carbonate; (iii) from about 1% to about 12% of a pyrophosphate material selected from the group consisting of ammonium, sodium and potassium pyrophosphates; and (iv) not more than about 5% of other phosphate builder salts; all percentages being by weight of the composition.
Claim 2
Dependent Claim
91 words
An alkaline detergent composition for fabric washing containing: (i) from about 10% to about 40% of a synthetic detergent surfactant selected from the group consisting of anionic, nonionic, amphoteric zwitterionic detergent surfactant and mixtures thereof; (ii) from about 10% to less than about 40% of an alkali metal carbonate; (iii) from about 1% to about 12% of a pyrophosphate material selected from the group consisting of ammonium, sodium and potassium pyrophosphates; and (iv) not more than about 5% of other phosphate builder salts; all percentages being by weight of the composition.
Claim 3
Dependent Claim
21 words
A composition according to claim 1, wherein said pyrophosphate material is selected from the group consisting of sodium and potassium pyrophosphates.
Claim 4
Dependent Claim
26 words
A composition according to claim 2, wherein said pyrophosphate material is present in an amount of about 2% to about 10% by weight of said composition.
Claim 5
Dependent Claim
30 words
A composition according to claim 1, wherein said composition contains from about 0.5% to about 2.5% by weight of said composition of phosphorus in the form of said pyrophosphate material.
Claim 6
Dependent Claim
41 words
A composition according to claim 1, wherein the total amount of said synthetic detergent surfactant, said alkali metal carbonate, said pyrophosphate material and said other phosphate builder salts, when present, is in excess of about 30% by weight of said composition.
Claim 7
Dependent Claim
33 words
A composition according to claim 1, wherein said composition additionally contains from about 10% to about 50% by weight of said composition of a inorganic peroxygen bleach other than an alkali metal percarbonate.
Claim 8
Dependent Claim
16 words
A composition according to claim 1, wherein the alkali metal carbonate is an alkali metal percarbonate.
References Cited (Backward Citations)
US4196093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |