US4348293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble, water-permeable bag having a water-soluble or water-dispersable protective layer and containing a particulate detergent composition
Assignee: Lever Brothers Co
•
Filing: 1979-11-16
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Granted: 1982-09-07
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Expires: 1999-11-16
Abstract
Abstract A detergent product comprises a water-insoluble, water-permeable bag containing a particulate detergent composition, the bag material having a water-soluble or removable water-insoluble layer to protect the bag material from the composition and to reduce dusting. The protective layer may be coated on or impregnated into the bag material or may form a continuous layer laminated to the inside of the bag material or may be in the form of a separate inner bag. The water-soluble material may be soluble polyvinyl alcohol, polyethylene glycol, polysaccharide, alkali metal silicate, soap, nonionic detergent, gelatine, salts or esters of alginic acid. The removable water-insoluble material may be a silicone, a fatty acid, a water-insoluble cationic fabric softener, polyvinylacetate, insoluble polyvinyl alcohol, clay, zeolite, calcite, silica, titania or a wax. The bag material may be paper and/or plastics material such as polypropylene. The detergent composition is a fully formulated composition or other fabric treatment material.
Inventors
- 👤 David E. Clarke
- 👤 James F. Davies
- 👤 John B. Tune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:06
CPC Classifications
B; B65; B65D; B65D85/00; B65D85/70; B65D85/804; B65D85/808; B65D85/8085; C; C11; C11D; C11D17/00; C11D17/04; C11D17/041; C11D17/046
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
74 words
In a detergent product comprising a particulate detergent composition contained within a closed water-insoluble water-permeable bag formed of sheet material, the improvement which comprises the provision of a layer of water-soluble or water-dispersible material between said particulate detergent composition and said sheet material in an amount effective to protect the bag material from the detergent composition and substantially to prevent dusting-out of the detergent composition through the sheet material when in a dry state.
Claim 2
Dependent Claim
74 words
In a detergent product comprising a particulate detergent composition contained within a closed water-insoluble water-permeable bag formed of sheet material, the improvement which comprises the provision of a layer of water-soluble or water-dispersible material between said particulate detergent composition and said sheet material in an amount effective to protect the bag material from the detergent composition and substantially to prevent dusting-out of the detergent composition through the sheet material when in a dry state.
Claim 3
Dependent Claim
23 words
A detergent product according to claim 1, wherein the bag is formed of paper, woven, knitted or non-woven fabric or plastics sheet material.
Claim 4
Dependent Claim
38 words
A detergent product according to claim 1, wherein the bag is formed of a material selected from the group consisting of polyamide, polyester, polyacrylic, cellulose acetate, polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride and cellulosic fibres and mixtures thereof.
Claim 5
Dependent Claim
18 words
A detergent product according to claim 1, wherein the protective layer is a continuous layer of water-soluble material.
Claim 6
Dependent Claim
20 words
A detergent product according to claim 4, wherein the continuous layer of water-soluble material is laminated to the sheet material.
Claim 7
Dependent Claim
23 words
A detergent product according to claim 4, wherein the continuous layer is in the form of a water-soluble bag inside the water-insoluble bag.
Claim 8
Dependent Claim
26 words
A detergent product according to claim 1, wherein the protective layer is a discontinuous layer of water-soluble material coated on or impregnated in the sheet material.
Claim 9
Dependent Claim
16 words
A detergent product according to claim 1, wherein the water-soluble material is a synthetic water-soluble polymer.
Claim 10
Dependent Claim
17 words
A detergent product according to claim 8, wherein the water-soluble material is soluble polyvinyl-alcohol or polyethylene glycol.
Claim 11
Dependent Claim
26 words
A detergent product according to claim 1, wherein the water-soluble material is selected from the group consisting of polysaccharides, alkali metal silicates, soaps and nonionic detergents.
Claim 12
Dependent Claim
38 words
A detergent product according to claim 1, wherein the water-soluble material is selected from the group consisting of gelatine, salts or esters of alginic acid, salts and esters of methyl cellulose, carboxymethyl cellulose and water-soluble cationic fabric softeners.
Claim 13
Dependent Claim
25 words
A detergent product according to claim 1, wherein the water-dispersible material is a silicone, a fatty acid, a water-insoluble cationic fabric softener, wax or clay.
Claim 14
Dependent Claim
28 words
A detergent product according to claim 1, wherein the thickness of the layer of water-soluble material is between about 15 g/m 2 and about 45 g/m 2 .
Claim 15
Dependent Claim
22 words
A detergent product according to claim 13, wherein the thickness of the layer of water-soluble material is about 30 g/m 2 .
Claim 16
Dependent Claim
58 words
A detergent product according to claim 7, wherein the particle size distribution of the detergent composition, the pore size distribution of the sheet material and the thickness of the water-soluble material layer are such in relation to each other that less than about 5% of the detergent composition particles can pass through the pores of the sheet material.
Claim 17
Dependent Claim
58 words
A detergent product according to claim 7, wherein the particle size distribution of the detergent composition, the pore size distribution of the sheet material and the thickness of the water-soluble material layer are such in relation to each other that less than about 1% of the detergent composition particles can pass through the pores of the sheet material.
Claim 18
Dependent Claim
43 words
A detergent product according to claim 1, wherein the detergent composition is selected from the group consisting of fully formulated detergent compositions, bleaches, bleach precursors, fabric softeners, starch, perfumes, anti-bacterial agents, anti-static agents, whitening agents, blueing agents, stain removing agents and mixtures thereof.
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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) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |