US4299716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent compositions
Assignee: Lever Brothers Co
•
Filing: 1980-03-03
•
Granted: 1981-11-10
•
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 5%) of orthophosphate, 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 as low cost products elsewhere.
Inventors
- 👤 John S. Cottrell
- 👤 Peter J. Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:37
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/06; C11D3/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
An alkaline detergent composition for fabric washing containing (i) from about 10% to about 40% of a synthetic detergent surfactant selected from the groups consisting of anionic, nonionic, amphoteric and zwitterionic detergent surfactants and mixture thereof; (ii) from about 10% to about 40% of an alkali metal carbonate; (iii) from about 1% to less than 5% of an orthophosphate material selected from the group consisting of orthophosphoric acid and the ammonium, sodium or potassium salts thereof; and (iv) not more than 5% of other phosphate builder salts, all percentages being by weight of the composition.
Claim 2
Dependent Claim
95 words
An alkaline detergent composition for fabric washing containing (i) from about 10% to about 40% of a synthetic detergent surfactant selected from the groups consisting of anionic, nonionic, amphoteric and zwitterionic detergent surfactants and mixture thereof; (ii) from about 10% to about 40% of an alkali metal carbonate; (iii) from about 1% to less than 5% of an orthophosphate material selected from the group consisting of orthophosphoric acid and the ammonium, sodium or potassium salts thereof; and (iv) not more than 5% of other phosphate builder salts, all percentages being by weight of the composition.
Claim 3
Dependent Claim
22 words
A composition according to claim 1 wherein said orthophosphate material is selected from the group consisting of sodium and potassium orthophosphate salts.
Claim 4
Dependent Claim
27 words
A composition according to claim 2, wherein said orthophosphate material is present in an amount of from about 1% to about 4.5% by weight of said composition.
Claim 5
Dependent Claim
30 words
A composition according to claim 1, wherein said composition contains from about 0.2% to about 1.5% by weight of said composition of phosphorus in the form of said orthophosphate material.
Claim 6
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 7
Dependent Claim
16 words
A composition according to claim 1, wherein said alkali metal carbonate is an alkali metal percarbonate.
References Cited (Backward Citations)
US4196003A
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 |