US4624890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article suitable for wiping surfaces
Assignee: Lever Brothers Co
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Filing: 1985-02-13
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Granted: 1986-11-25
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Expires: 2005-02-13
Abstract
Abstract A wiping cloth or similar article especially suitable for wiping glossy hard surfaces to give a streak-free result comprises a flexible absorbent substrate of fibrous material, having a base weight of at least 50 g/m 2 and a thickness of at least 0.5 mm, advantageously consisting at least partially of natural cellulosic fibres, treated with a cationic polyacrylamide to enhance its soil capture capability, and carrying a fully formulated liquid cleaning composition.
Inventors
- 👤 John Lloyd
- 👤 George K. Rennie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:42
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3769; A; A47; A47L; A47L13/00; A47L13/10; A47L13/16; A47L13/17; C11D17/00; C11D17/04; C11D17/049; D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/285; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31; Y10T442/00; Y10T442/20; Y10T442/2279; Y10T442/2508; Y10T442/2762; Y10T442/277
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
69 words
An article suitable for wiping surfaces, said article comprising a flexible absorbent substrate of fibrous material treated with a cationic polymeric dirt-capture agent and carrying a liquid cleaning composition, characterised in that the substrate comprises a sheet material having a base weight of at least 50 g/m 2 and a thickness of at least 0.5 mm and in that the cationic polymeric dirt-capture agent is a water-soluble cationic polyacrylamide.
Claim 2
Dependent Claim
69 words
An article suitable for wiping surfaces, said article comprising a flexible absorbent substrate of fibrous material treated with a cationic polymeric dirt-capture agent and carrying a liquid cleaning composition, characterised in that the substrate comprises a sheet material having a base weight of at least 50 g/m 2 and a thickness of at least 0.5 mm and in that the cationic polymeric dirt-capture agent is a water-soluble cationic polyacrylamide.
Claim 3
Dependent Claim
47 words
An article according to claim 1, characterised in that the cationic polymeric dirt-capture agent is a copolymer comprising at least 50 mole % of acrylamide units and up to 50 mole % of an aminoalkyl ester of acrylic or methacrylic acid which is wholly or partially quaternised.
Claim 4
Dependent Claim
43 words
An article according to claim 2, characterised in that the cationic polymeric dirt-capture agent is a copolymer comprising from 80 to 97 mole % of acrylamide units and from 3 to 20 mole % of units of said wholly or partially quaternised ester.
Claim 5
Dependent Claim
29 words
An article according to claim 2, characterised in that the cationic polymeric dirt-capture agent comprises acrylamide units and units of wholly or partially quaternised dimethylaminoethyl acrylate or diethylaminoethyl acrylate.
Claim 6
Dependent Claim
40 words
An article according to claim 2, characterised in that the cationic polymeric dirt-capture agent comprises acrylamide units and units of an aminoalkyl ester of acrylic or methacrylic acid having a degree of quaternisation of from 3 to 50 mole %.
Claim 7
Dependent Claim
24 words
An article according to claim 1, characterised in that the cationic polymeric dirt-capture agent has a molecular weight of from 5 to 20 million.
Claim 8
Dependent Claim
19 words
An article according to claim 1, characterised in that the substrate consists at least partially of natural cellulosic fibres.
Claim 9
Dependent Claim
37 words
An article according to claim 1, characterised in that the substrate is in the form of a single-layer or multiple-layer sheet and comprises a layer of bulky fibrous sheet material having a porosity of at least 80%.
Claim 10
Dependent Claim
67 words
An article according to claim 8, characterized in that said bulky fibrous sheet material includes at least some thermoplastic fibres and that at least one outer surface of said layer of bulky fibrous sheet material is partially provided with flattened areas formed by coalescing said thermoplastic fibres through the application of heat and pressure to such an extent as substantially to cause loss of their fibrous identity.
Claim 11
Dependent Claim
32 words
An article according to claim 1, characterised in that all the cationic polymeric dirt-capture agent present is so bound by the fibres of the substrate that it cannot be removed by washing.
Claim 12
Dependent Claim
28 words
An article according to claim 1, characterised in that the substrate consists of a single layer of flexible fibrous wet-strength sheet material impregnated with a liquid cleaning composition.
Claim 13
Dependent Claim
32 words
An article according to claim 1, characterised in that the substrate comprises at least two layers of flexible fibrous wet-strength sheet material laminated together and is impregnated with the liquid cleaning composition.
Claim 14
Dependent Claim
20 words
An article according to claim 1, characterised in that the substrate carries a liquid cleaning composition in controlled release form.
Claim 15
Dependent Claim
39 words
An article according to claim 13, characterised in that the substrate comprises two layers of flexible fibrous wet-strength sheet material having a layer of absorbent material positioned between them, said absorbent material being impregnated with the liquid cleaning composition.
Claim 16
Dependent Claim
41 words
An article according to claim 14, characterised in that said absorbent material is a porous polymer capable of retaining at least 5 ml of liquid per g polymer against gravity and of releasing said liquid on the application of hand pressure.
Claim 17
Dependent Claim
26 words
An article according to claim 15, characterised in that the porous polymer is a styrene homo- or copolymer or a chemically modified styrene homo- or copolymer.
Claim 18
Dependent Claim
16 words
An article according to claim 16, characterised in that the porous polymer is a sulphonated polystyrene.
Claim 19
Dependent Claim
50 words
An article according to claim 1, characterised in that the liquid cleaning composition is a homogeneous aqueous solution having a surface tension of less than 45 mNm -1 which when applied to a surrface and allowed to dry, dries substantially without forming discrete droplets or particles larger than 0.25 μm.
Claim 20
Dependent Claim
37 words
An article according to claim 18, characterised in that the liquid cleaning composition contains water, a nonionic surfactant in an amount not exceeding 1.5% by weight, and optionally a lower aliphatic alcohol selected from ethanol and isopropanol.
Claim 21
Dependent Claim
42 words
A process for the production of an article according to claim 1, characterised in that: (i) the substrate is treated with a solution of a cationic polyacrylamide; (ii) the substrate is dried; (iii) the substrate is impregnated with the liquid cleaning composition.
Claim 22
Dependent Claim
50 words
A process for the production of an article according to claim 20, characterized in that subsequent to step (ii) but before step (iii), the substrate is washed with water or with the liquid cleaning composition to remove any of said cationic polyacrylamide not bound to the fibres of the substrate.
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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) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |