US4051054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent compositions
Assignee: Lever Brothers Co
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Filing: 1976-05-12
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Granted: 1977-09-27
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Expires: 1996-05-12
Abstract
Abstract A detergent additive is prepared by adsorbing a nonionic detergent active compound onto finely divided calcium carbonate, to facilitate the processing of detergent compositions. The additive is preferably employed in detergent compositions with alkali metal carbonate detergency builders, where the calcium carbonate tends to improve detergency and decrease deposits on washed fabrics.
Inventors
- 👤 Charles Bloor Davies
- 👤 James Francis Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:12
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D1/72; C11D11/00; C11D11/0082; C11D17/00; C11D17/0034; C11D3/00; C11D3/02; C11D3/12; C11D3/1233
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
38 words
A solid detergent additive consisting essentially of from about 5% to about 55% by weight of a nonionic detergent compound absorbed onto finely divided calcium carbonate having a surface area of at least about 5 m 2 /g.
Claim 2
Dependent Claim
38 words
A solid detergent additive consisting essentially of from about 5% to about 55% by weight of a nonionic detergent compound absorbed onto finely divided calcium carbonate having a surface area of at least about 5 m 2 /g.
Claim 3
Dependent Claim
13 words
A detergent additive according to claim 1 wherein the calcium carbonate is calcite.
Claim 4
Dependent Claim
28 words
A detergent additive according to claim 1 wherein the calcium carbonate has a surface area of from about 20 m 2 /g to about 100 m 2 /g.
Claim 5
Dependent Claim
28 words
A detergent additive according to claim 1 wherein the calcium carbonate has a surface area of from about 30 m 2 /g to about 85 m 2 /g.
Claim 6
Dependent Claim
29 words
A detergent additive according to claim 1, wherein the calcium carbonate is in the form of granules containing at least 60% by weight of finedly divided calcium carbonate particles.
Claim 7
Dependent Claim
52 words
A detergent composition consisting essentially of from about 10% to about 75% by weight of an alkali metal carbonate detergency builder and a detergent additive according to claim 1, the amount of nonionic detergent compound in the detergent additives being from about 1% to about 40% by weight of the detergent composition.
Claim 8
Dependent Claim
20 words
A detergent additive according to claim 1, wherein the nonionic detergent compound is an ethoxylated synthetic or natural fatty alcohol.
Claim 9
Dependent Claim
30 words
A detergent additive according to claim 7 wherein the nonionic detergent compound has C 10 to C 18 alkyl groups and about 5 to 12 ethylene oxide groups per molecule.
Claim 10
Dependent Claim
56 words
A process for forming a detergent additive according to claim 1 comprising dissolving a nonionic detergent compound in a volatile solvent of water, diethyl ether or lower aliphatic alcohols, mixing the solution with finely divided calcium carbonate having a surface area of at least 5 m 2 /g, and then evaporating the solvent from the mixture.
Claim 11
Dependent Claim
11 words
A process according to claim 9 wherein the solvent is water.
Claim 12
Dependent Claim
11 words
A process according to claim 9 wherein the solvent is diethylether.
Claim 13
Dependent Claim
11 words
A process according to claim 9 wherein the solvent is ethanol.
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |