US4151104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Built liquid bleaching compositions
Assignee: Clorox Co
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Filing: 1978-02-06
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Granted: 1979-04-24
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Expires: 1998-02-06
Abstract
Abstract An aqueous bleaching composition having a pH from about 11 to 14, comprising an alkali metal hypochlorite, an alkali metal orthophosphate buffer, and an alkali metal pyrophosphate builder. The buffer increases the stability of the hypochlorite formulation to be comparable to a non-built composition of equal hypochlorite content despite the solution's increased ionic strength. The builder significantly aids in soil removal during laundering operations.
Inventors
- 👤 Vincent E. Alvarez
- 👤 Lodric L. Maddox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:21
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/395; C11D3/3958; C11D3/3956
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
163 words
A built aqueous bleaching composition for addition to fabric laundering solutions containing detergents consisting essentially of: (a) from about 1.5% to about 7% weight of sodium hypochlorite; (b) from about 0.5% to about 5.5% by weight of an alkali metal orthophosphate buffer where the alkali metal is selected from the group consisting of sodium and potassium and is a tri-alkali metal orthophosphate, wherein the buffer maintains the pH of the composition to fall within the range from about 11.5 to about 13, and stabilizes the hypochlorite during shelf life; (c) from about 4.0% to about 20% by weight of an alkali metal pyrophosphate builder where the alkali metal of the pyrophosphate builder is selected from the group consisting of sodium and potassium and is a tetra-alkali metal pyrophosphate, and the builder to buffer weight ratio is not less than 1.5 to 1, and the builder assists the detergent soil removal action of said laundering solution during fabric laundering; and (d) the balance water.
Claim 2
Dependent Claim
163 words
A built aqueous bleaching composition for addition to fabric laundering solutions containing detergents consisting essentially of: (a) from about 1.5% to about 7% weight of sodium hypochlorite; (b) from about 0.5% to about 5.5% by weight of an alkali metal orthophosphate buffer where the alkali metal is selected from the group consisting of sodium and potassium and is a tri-alkali metal orthophosphate, wherein the buffer maintains the pH of the composition to fall within the range from about 11.5 to about 13, and stabilizes the hypochlorite during shelf life; (c) from about 4.0% to about 20% by weight of an alkali metal pyrophosphate builder where the alkali metal of the pyrophosphate builder is selected from the group consisting of sodium and potassium and is a tetra-alkali metal pyrophosphate, and the builder to buffer weight ratio is not less than 1.5 to 1, and the builder assists the detergent soil removal action of said laundering solution during fabric laundering; and (d) the balance water.
Claim 3
Dependent Claim
19 words
A composition as in claim 1, wherein: (a) the buffer is tri-potassium orthophosphate; (b) the builder is tetra-potassium pyrophosphate.
Claim 4
Dependent Claim
34 words
A composition as in claim 2 wherein: The sodium hypochlorite is in an amount of at least 3% by weight; and The tetra-potassium pyrophosphate is in an amount of at least 9% by weight.
References Cited (Backward Citations)
US4005027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |