Patent US3945936A successfully refreshed from Google Patents.
US3945936A
Expired / Lapsed
US
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Bleaching article
Assignee: Procter and Gamble Co
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Filing: 1974-01-29
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Granted: 1976-03-23
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Expires: 1994-01-29
Abstract
Abstract A porous article releasably containing a dry, activated bleaching composition suitable for use in an automatic dryer.
Inventors
- 👤 Malcolm Bramel Lucas
- 👤 James Francis McKenna
- 👤 Francis Louvaine Diehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:43
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/04; C11D17/041; C11D17/047; C11D17/02; C11D3/00; C11D3/39; C11D3/3902; D; D06; D06F; D06F58/00; D06F58/20; D06F58/203
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
79 words
An article of manufacture especially adapted for bleaching fabrics in an automatic clothes dryer, consisting essentially of: a. a water-insoluble, closed, flexible pouch, at least one wall of said pouch consisting of an open pore polyurethane foam having a density of from about 0.75 lb./cu. ft. to about 1.50 lb./cu. ft.; and b. an effective amount of a solid, particulate, water-soluble fabric bleaching composition consisting essentially of a peroxygen bleach, said bleaching composition being releasably enclosed within the pouch.
Claim 2
Dependent Claim
79 words
An article of manufacture especially adapted for bleaching fabrics in an automatic clothes dryer, consisting essentially of: a. a water-insoluble, closed, flexible pouch, at least one wall of said pouch consisting of an open pore polyurethane foam having a density of from about 0.75 lb./cu. ft. to about 1.50 lb./cu. ft.; and b. an effective amount of a solid, particulate, water-soluble fabric bleaching composition consisting essentially of a peroxygen bleach, said bleaching composition being releasably enclosed within the pouch.
Claim 3
Dependent Claim
42 words
An article according to claim 1 wherein the pouch is made of open pore polyurethane foam having a density of from about 1.1 lbs/cu. ft. to about 1.3 lbs/cu. ft. and a thickness of from about 0.1 in. to about 0.5 in.
Claim 4
Dependent Claim
22 words
An article according to claim 2 wherein the bleaching composition has an average particle diameter of from about 25μ to about 200μ.
Claim 5
Dependent Claim
23 words
An article according to claim 1 wherein the fabric bleaching composition consists essentially of a solid peroxygen bleach and a solid bleach activator.
Claim 6
Dependent Claim
23 words
An article according to claim 4 wherein the peroxygen bleach is selected from the group consisting of alkali metal perborates and ammonium perborate.
Claim 7
Dependent Claim
13 words
An article according to claim 5 wherein the bleach activator is 1,3,4,6-tetra-acetyl glycouril.
Claim 8
Dependent Claim
92 words
An article of manufacture according to claim 1 especially adapted for bleaching fabrics in an automatic dryer, consisting essentially of: a. a water-insoluble, closed, flexible pouch, the walls of said pouch consisting of open pore polyurethane foam having a density of about 1.1 lbs/cu. ft. to about 1.3 lbs/cu. ft. and a thickness of from about 0.15 in. to about 0.35 in.; and b. a bleaching amount of a particulate fabric bleaching composition consisting essentially of sodium perborate and 1,3,4,6-tetra-acetyl glycouril, said bleaching composition having an average particle diameter below about 150μ.
Claim 9
Dependent Claim
24 words
An article according to claim 7 in which the pouch releasably contains from about 20 grams to about 30 grams of the bleaching composition.
Claim 10
Dependent Claim
25 words
An article according to claim 8 which includes as an additional component, an effective amount of a particulate optical brightener releasably contained within said pouch.
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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |