US4028262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Citrate-carbonate built detergent
Assignee: Colgate Palmolive Co
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Filing: 1975-01-24
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Granted: 1977-06-07
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Expires: 1995-01-24
Abstract
Abstract Detergent compositions using only alkali metal citrate and carbonate builder salts are disclosed. The detergent compositions disclosed have a lower alkalinity than phosphate-free detergents employing high concentrations of silicates.
Inventors
- 👤 Bao-Ding Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:50
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2086; C11D1/00; C11D1/66; C11D1/83; C11D1/831; C11D3/02; C11D3/04; C11D3/10; C11D1/02; C11D1/12; C11D1/22; C11D1/72
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
A phosphate-free nonionic-based detergent composition consisting essentially of, approximately by weight, 5 to 30% of a synthetic detergent selected from the group consisting of nonionic reaction products of 6 to 30 moles of ethylene oxide with higher fatty alcohols and 1:1 by weight mixtures thereof with dodecyl benzene sulfonate, 45 to 55% of sodium carbonate, and 10 to 33% of sodium citrate. the sodium carbonate and sodium citrate being correlated so that the weight ratio of sodium carbonate to sodium citrate is less than or equal to about 2 under washing conditions of water of 150ppm hardness and 40° C.
Claim 2
Dependent Claim
100 words
A phosphate-free nonionic-based detergent composition consisting essentially of, approximately by weight, 5 to 30% of a synthetic detergent selected from the group consisting of nonionic reaction products of 6 to 30 moles of ethylene oxide with higher fatty alcohols and 1:1 by weight mixtures thereof with dodecyl benzene sulfonate, 45 to 55% of sodium carbonate, and 10 to 33% of sodium citrate. the sodium carbonate and sodium citrate being correlated so that the weight ratio of sodium carbonate to sodium citrate is less than or equal to about 2 under washing conditions of water of 150ppm hardness and 40° C.
Claim 3
Dependent Claim
30 words
A detergent as in claim 1 further containing from about 5 to about 30% of sodium silicate having a weight ratio of silica to sodium oxide of 0.5 to 3.2.
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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |