Patent US4374747A successfully refreshed from Google Patents.
US4374747A
Expired / Lapsed
US
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Bleach products
Assignee: Lever Brothers Co
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Filing: 1980-03-31
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Granted: 1983-02-22
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Expires: 2000-03-31
Abstract
Abstract A bleach product comprising a percompound contained within a closed water-insoluble but water-permeable bag of fibrous material, provided with a protective water-impermeable coating which is removable in water at a temperature of 30 DEG -75 DEG C., preferably 35 DEG -65 DEG C. The bleach product can be used in fabric washing machines for bleaching fabrics with or without a detergent product.
Inventors
- 👤 Ho T. Tai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:59
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/04; C11D17/041; C11D17/046; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3907; C11D3/3917
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
58 words
A bleach product comprising a percompound contained within a closed water-insoluble but water-permeable bag of fibrous sheet material in the form of paper or of woven or non woven fabric provided with a protective water-impermeable coating, removable in water at a temperature of 30°-75° C. said coating being of an organic material which is solid at room temperature.
Claim 2
Dependent Claim
58 words
A bleach product comprising a percompound contained within a closed water-insoluble but water-permeable bag of fibrous sheet material in the form of paper or of woven or non woven fabric provided with a protective water-impermeable coating, removable in water at a temperature of 30°-75° C. said coating being of an organic material which is solid at room temperature.
Claim 3
Dependent Claim
19 words
A bleach product according to claim 1, wherein the protective coating is removable at a temperature of 35°-65° C.
Claim 4
Dependent Claim
36 words
A bleach product according to claim 1 or 2, wherein the material for said protective coating is selected from the group consisting of waxes, fatty acids, algic acids, ethoxylated or non-ethoxylated fatty alcohols and polyvinyl alcohols.
Claim 5
Dependent Claim
25 words
A bleach product according to claim 1, comprising an inorganic percompound and an alkaline material to provide an initial pH in solution of about 10-12.
Claim 6
Dependent Claim
25 words
A bleach product according to claim 4, wherein said alkali material is selected from the group consisting of alkalimetal silicates, alkalimetal hydroxides and mixtures thereof.
Claim 7
Dependent Claim
17 words
A bleach product according to claim 1, comprising an inorganic percompound and an activator for said percompound.
Claim 8
Dependent Claim
11 words
A bleach product according to claim 1, comprising an organic peracid.
Claim 9
Dependent Claim
21 words
A bleach product according to claim 4 or 5, wherein the protective coating is removable at a temperature of 50°-75° C.
Claim 10
Dependent Claim
21 words
A bleach product according to claim 6 or 7, wherein the protective coating is removable at a temperature of 30°-50° C.
Claim 11
Dependent Claim
23 words
A bleach product according to claim 6, wherein said activator is present in a weight ratio to the percompound of 1:1 to 1:35.
Claim 12
Dependent Claim
15 words
A bleach product according to claim 1, comprising 0.4 to 20 grams of a percompound.
Claim 13
Dependent Claim
15 words
A bleach product according to claim 11, comprising 1 to 15 grams of said percompound.
References Cited (Backward Citations)
US3637339A
Cited
US4009113A
Cited
US3992317A
Cited
US3945936A
Cited
US3989638A
Cited
US4118304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |