US4139486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Built detergent composition
Assignee: Procter and Gamble Co
•
Filing: 1977-03-22
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Granted: 1979-02-13
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Expires: 1997-03-22
Abstract
Abstract Detergent compositions containing orthophosphate and pyrophosphate builders in prescribed ratios and magnesium silicate are claimed wherein the final composition has a minimum amount of free alkalinity as NaOH. The compositions demonstrate superior whiteness maintenance and lower undesirable residual deposits on fabrics washed therein. The compositions optionally contain a small amount of a water soluble magnesium salt, e.g., magnesium sulfate and may also contain phosphate more condensed than pyrophosphate.
Inventors
- 👤 John Bailey
- 👤 Leslie H. Cassie
- 👤 Paul R. Sherrington
- 👤 Paul VAN Roo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:11
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/08; C11D3/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
A detergent composition consisting essentially of: (a) from about 1% to about 70% by weight of the composition of an organic surface active agent selected from the group consisting of anionic detergent and nonionic detergent and mixtures thereof; (b) from about 5% to about 50% by weight of the composition of a mixture of phosphates selected from the group consisting of sodium orthophosphate, sodium pyrophosphate, potassium orthophosphate and potassium pyrophosphate wherein the weight ratio of ortho- to pyrophosphate is in the range from 9:2 to 3:7; and (c) from about 0.1% to about 10% by weight of the composition of a magnesium silicate having a ratio SiO 2 :MgO (molar) in the range from 3.2:1 to 1:4, wherein the composition has free alkalinity of from 6% to 8% NaOH by weight.
Claim 2
Dependent Claim
131 words
A detergent composition consisting essentially of: (a) from about 1% to about 70% by weight of the composition of an organic surface active agent selected from the group consisting of anionic detergent and nonionic detergent and mixtures thereof; (b) from about 5% to about 50% by weight of the composition of a mixture of phosphates selected from the group consisting of sodium orthophosphate, sodium pyrophosphate, potassium orthophosphate and potassium pyrophosphate wherein the weight ratio of ortho- to pyrophosphate is in the range from 9:2 to 3:7; and (c) from about 0.1% to about 10% by weight of the composition of a magnesium silicate having a ratio SiO 2 :MgO (molar) in the range from 3.2:1 to 1:4, wherein the composition has free alkalinity of from 6% to 8% NaOH by weight.
Claim 3
Dependent Claim
41 words
A composition according to claim 1 wherein said organic surface active agent is from about 10% to about 30% by weight of the composition and wherein said phosphate mixture is from about 15% to about 33% by weight of the composition.
Claim 4
Dependent Claim
20 words
A composition according to claim 2 wherein said ratio of ortho to pyrophosphate is in the range 7:3 to 1:1.
Claim 5
Dependent Claim
25 words
A composition according to claim 3 wherein said magnesium silicate has a ratio of SiO 2 :MgO (molar) in the range from 3.2:1 to 1:1.5.
Claim 6
Dependent Claim
22 words
A composition according to claim 4 wherein said magnesium silicate is from about 1% to about 5% by weight of the composition.
Claim 7
Dependent Claim
41 words
A composition according to claim 5 wherein said magnesium silicate has a ratio SiO 2 :MgO (molar) in the range from 1:1 to 1:1.5 and wherein said magnesium silicate is from about 1.5% to about 3% by weight of the composition.
Claim 8
Dependent Claim
57 words
A composition according to claim 5 which also contains from about 0.5% to about 6% by weight of the composition of a particulate water soluble magnesium salt (calculated as anhydrous magnesium sulfate) wherein the weight ratio of said magnesium silicate to said particulate water soluble magnesium salt (calculated as anhydrous magnesium sulfate) is from 10:1 to 1:10.
Claim 9
Dependent Claim
51 words
A composition according to claim 7 wherein said particulate water soluble magnesium salt is from about 1% to about 5% (calculated as anhydrous magnesium sulfate) and wherein said weight ratio of said magnesium silicate to said particulate water soluble magnesium salt (calculated as anhydrous magnesium sulfate) is from 2:1 to 1:2.
Claim 10
Dependent Claim
59 words
A composition according to claim 8 which also contains a condensed phosphate more condensed than pyrophosphate so that said condensed phosphate does not form more than 25% by weight of the total amount of phosphates in the composition and so that the amount of any glassy phosphates therein is not more than 4% by weight of the total composition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |