US4119557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bleaching compositions and process for cleaning fabrics
Assignee: Lever Brothers Co
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Filing: 1976-12-15
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Granted: 1978-10-10
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Expires: 1996-12-15
Abstract
Abstract Bleaching compositions comprising a hydrogen peroxide liberating persalt, such as sodiumperborate, and a preformed ferric ion complex with a polycarboxyamine-type chelating agent, selected from the group consisting of ethylene diamine tetraacetic acid, nitrilotriacetic acid, diethylene triamine pentaacetic acid, and hydroxyethyl ethylene diamine triacetic acid, and mixtures thereof. The composition is used for cleaning fabrics.
Inventors
- 👤 Dennis Postlethwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:48
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3932; D; D06; D06L; D06L4/00; D06L4/10; D06L4/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A bleaching and detergent composition for cleaning fabrics comprising from 5% to 50% by weight of an organic surface-active agent selected from the group consisting of anionic, nonanionic, zwitterionic and cationic detergents, and mixtures thereof; from 5% to 80% by weight of builder salts; from 5% to 35% by weight of a persalt selected from the group consisting of alkali metal perborates, alkali metal percarbonates and mixtures thereof; and from 0.05% to 1.0% by weight of a preformed ferric ion chelate complex, said complex being a complex of ferric ion with ethylene diamine tetraacetic acid, nitrilotriacetic acid, diethylene triamine pentaacetic acid, or hydroxyethyl ethylene diamine triacetic acid.
Claim 2
Dependent Claim
107 words
A bleaching and detergent composition for cleaning fabrics comprising from 5% to 50% by weight of an organic surface-active agent selected from the group consisting of anionic, nonanionic, zwitterionic and cationic detergents, and mixtures thereof; from 5% to 80% by weight of builder salts; from 5% to 35% by weight of a persalt selected from the group consisting of alkali metal perborates, alkali metal percarbonates and mixtures thereof; and from 0.05% to 1.0% by weight of a preformed ferric ion chelate complex, said complex being a complex of ferric ion with ethylene diamine tetraacetic acid, nitrilotriacetic acid, diethylene triamine pentaacetic acid, or hydroxyethyl ethylene diamine triacetic acid.
Claim 3
Dependent Claim
63 words
A composition according to claim 1, comprising from 5% to 35% by weight of an organic surface-active agent selected from the group consisting of anionic and nonionic detergents, and mixtures thereof; from 10% to 60% by weight of sodium tripolyphosphate; from 10% to 25% by weight of said persalt, and from 0.1% to 0.8% by weight of said preformed ferric ion chelate complex.
Claim 4
Dependent Claim
16 words
A composition according to claim 1, having a pH, measured from a 0.5% solution of 8.5-10.5.
Claim 5
Dependent Claim
12 words
A composition according to claim 3, wherein the pH is from 9-10.
Claim 6
Dependent Claim
25 words
A composition according to claim 1, wherein said ferric ion chelate complex is present in an amount of about 0.1-7.0% by weight of the persalt.
Claim 7
Dependent Claim
21 words
A composition according to claim 5, wherein said complex is present in an amount of 0.25-5% by weight of the persalt.
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) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |