US3996152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bleaching composition
Assignee: Procter and Gamble Co
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Filing: 1975-03-27
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Granted: 1976-12-07
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Expires: 1995-03-27
Abstract
Abstract Low pH, non-starch gels containing particulate peroxygen compounds, especially diperazelaic acid, provide safe, effective and stable fabric bleaching compositions for use at alkaline pH's, e.g., in laundry baths.
Inventors
- 👤 James Byrd Edwards
- 👤 Francis Louvaine Diehl
- 👤 Mario Stephen Marsan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:03
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3947; D; D06; D06L; D06L4/00; D06L4/10; D06L4/15
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
70 words
A fabric bleaching composition, characterized by a viscosity in the range of about 200 centipoise to about 100,000 centipoise, comprising: a. an effective amount of a solid, substantially water-insoluble peroxygen compound; b. an amount of a non-starch thickening agent sufficient to impart the desired viscosity to the composition; c. sufficient acidifying agent to maintain the pH of the composition in the acidic range until time-of-use; and d. a liquid carrier.
Claim 2
Dependent Claim
70 words
A fabric bleaching composition, characterized by a viscosity in the range of about 200 centipoise to about 100,000 centipoise, comprising: a. an effective amount of a solid, substantially water-insoluble peroxygen compound; b. an amount of a non-starch thickening agent sufficient to impart the desired viscosity to the composition; c. sufficient acidifying agent to maintain the pH of the composition in the acidic range until time-of-use; and d. a liquid carrier.
Claim 3
Dependent Claim
13 words
A composition according to claim 1 wherein the peroxygen compound is a peroxyacid.
Claim 4
Dependent Claim
12 words
A composition according to claim 2 wherein the peroxyacid is a diperoxyacid.
Claim 5
Dependent Claim
25 words
A composition according to claim 3 wherein the diperoxyacid is selected from the group consisting of diperazelaic acid, diperbrassylic acid, dipersebacic acid, and diperisophthalic acid.
Claim 6
Dependent Claim
21 words
A composition according to claim 4 wherein the solid diperoxyacid is characterized by an average particle diameter below about 1500 microns.
Claim 7
Dependent Claim
20 words
A composition according to claim 5 comprising from about 5 percent to about 35 percent by weight of the diperoxyacid.
Claim 8
Dependent Claim
32 words
A composition according to claim 1 wherein the thickening agent is a non-starch organic thickener and is present at a concentration of from about 0.1 percent to about 10 percent by weight.
Claim 9
Dependent Claim
18 words
A composition according to claim 7 wherein the organic thickener is selected from cellulosic, carboxypolymethylene, and proteinaceous thickeners.
Claim 10
Dependent Claim
43 words
A composition according to claim 1 wherein the thickening agent is an inorganic thickener selected from colloidal silicas, smectite-type clays and hydrophilic clays characterized in being a tri-layered mineral having an octahedral magnesia sheet between two tetrahedral silica sheets via shared oxygen atoms.
Claim 11
Dependent Claim
26 words
A composition according to claim 1 wherein the acidifying agent is KH 2 PO 4 , NaH 2 PO 4 , hydrochloric acid or citric acid.
Claim 12
Dependent Claim
12 words
A composition according to claim 1 wherein the liquid carrier is water.
Claim 13
Dependent Claim
55 words
A composition according to claim 1 comprising from about 15 percent to about 30 percent by weight of a particulate diperoxyacid; from about 0.1 percent to about 5 percent by weight of a carboxypolymethylene thickening agent; from about 0.1 percent to about 1 percent of an acidifying agent, the balance of the composition comprising water.
Claim 14
Dependent Claim
29 words
A composition according to claim 12 wherein the diperoxyacid is diperazelaic acid and has an average particle diameter in the range from about 10 microns to about 1000 microns.
Claim 15
Dependent Claim
18 words
A composition according to claim 13 containing, as an additional component, an odoriferous amount of a perfume component.
Claim 16
Dependent Claim
29 words
A composition according to claim 14 containing, as an additional component, an effective amount of a metal chelating agent, whereby the composition is substantially free of heavy metal cations.
Claim 17
Dependent Claim
14 words
A composition according to claim 7 wherein the organic thickener is methyl hydroxybutyl cellulose.
Claim 18
Dependent Claim
23 words
A composition according to claim 1 wherein the water-insoluble peroxygen compound represents from 1 percent to 40 percent by weight of the composition.
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) | 1979-12-07 | 1980-06-07 | 1980-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-07 | 1984-06-07 | 1984-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-07 | 1988-06-07 | 1988-12-07 | $7700.00 | Window Closed / Lapsed |