Patent US3989638A successfully refreshed from Google Patents.
US3989638A
Expired / Lapsed
US
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Bleaching article
Assignee: Procter and Gamble Co
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Filing: 1975-03-27
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Granted: 1976-11-02
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Expires: 1995-03-27
Abstract
Abstract Articles releasably containing starch-thickened peroxygen bleaches are provided.
Inventors
- 👤 William Jack Bradley
- 👤 Mario Stephen Marsan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:37
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/10; D06L4/15
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
107 words
A fabric bleaching article comprising an effective amount of a bleaching composition having a viscosity of from about 200 cps to about 100,000 cps, comprising: a. an effective amount of a solid, substantially water-insoluble peroxygen compound; b. an effective amount of a starch thickening agent; and c. a liquid carrier, wherein said bleaching composition is in releasable combination with a water-insoluble dispensing means characterized by being in the form of a pouch having perforations of a diameter from about 0.05 to about 3 mm or embossed in such a manner that upon rupture perforations are formed having a diameter of from about 0.05 to about 3 mm.
Claim 2
Dependent Claim
107 words
A fabric bleaching article comprising an effective amount of a bleaching composition having a viscosity of from about 200 cps to about 100,000 cps, comprising: a. an effective amount of a solid, substantially water-insoluble peroxygen compound; b. an effective amount of a starch thickening agent; and c. a liquid carrier, wherein said bleaching composition is in releasable combination with a water-insoluble dispensing means characterized by being in the form of a pouch having perforations of a diameter from about 0.05 to about 3 mm or embossed in such a manner that upon rupture perforations are formed having a diameter of from about 0.05 to about 3 mm.
Claim 3
Dependent Claim
40 words
An article according to claim 1 wherein the water-insoluble peroxygen compound represents from about 5 to about 35% by weight of the composition and the starch thickening agent represents from about 1 to about 25% by weight of the composition.
Claim 4
Dependent Claim
13 words
An article according to claim 2 wherein the peroxygen compound is a peroxyacid.
Claim 5
Dependent Claim
12 words
An article according to claim 3 wherein the peroxyacid is a diperoxyacid.
Claim 6
Dependent Claim
25 words
An article according to claim 4 wherein the diperoxyacid is selected from the group consisting of diperazelaic acid, diperbrassylic acid, dipersebacic acid, and diperisophthalic acid.
Claim 7
Dependent Claim
21 words
An article according to claim 5 wherein the solid diperoxyacid is characterized by an average particle diameter below about 1500 microns.
Claim 8
Dependent Claim
23 words
An article according to claim 1 wherein the thickening agent is selected from corn, wheat, rice, potato and tapioca starches, and derivatives thereof.
Claim 9
Dependent Claim
24 words
An article according to claim 7 wherein the thickener is corn starch and comprises from about 5% to about 20% of the bleaching composition.
Claim 10
Dependent Claim
12 words
An article according to claim 1 wherein the liquid carrier is water.
Claim 11
Dependent Claim
17 words
An article according to claim 1 wherein the pouch comprises flexible plastic embossed in a regular pattern.
Claim 12
Dependent Claim
35 words
An article according to claim 10 whereby the pouch, on rupture, has at least 30% of its total surface area comprised of holes having an average diameter of from about 0.5 to about 1 mm.
Claim 13
Dependent Claim
41 words
An article according to claim 10 wherein the bleaching composition comprises from about 20% to about 30% by weight of a particulate diperoxyacid; from about 10% to about 15% by weight of corn starch; the balance of the composition comprising water.
Claim 14
Dependent Claim
12 words
An article according to claim 12 wherein the diperoxyacid is diperazelaic acid.
Claim 15
Dependent Claim
18 words
An article according to claim 13 containing, as an additional component, an odoriferous amount of a perfume component.
Claim 16
Dependent Claim
30 words
An article according to claim 14 comprising, as an additional component, an effective amount of a metal chelating agent, whereby the bleaching composition is substantially free of heavy metal cations.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |