Patent US143669A successfully refreshed from Google Patents.
Patent US4600620A successfully refreshed from Google Patents.
US4600620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article suitable for wiping surfaces
Assignee: Lever Brothers Co
•
Filing: 1983-08-11
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Granted: 1986-07-15
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Expires: 2003-08-11
Abstract
Abstract A wiping cloth or the like, suitable for wiping glossy hard surfaces, comprises a sheet substrate carrying a liquid, for example, a streak-free cleaning composition. At least one external (wiping) surface of the substrate has flattened areas including thermoplastic material coalesced by the application of heat and pressure and open areas, and this external surface is immediately adjacent to a core of bulky high-porosity fibrous sheet material.
Inventors
- 👤 John Lloyd
- 👤 George K. Rennie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:20
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; A; A47; A47L; A47L13/00; A47L13/10; A47L13/16; A47L13/17; B32B27/06; B32B27/10; B32B3/00; B32B3/26; B32B3/266; B32B5/00; B32B5/02; B32B5/022; B32B2305/00; B32B2305/38; B32B2432/00; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24661; Y10T428/24802; Y10T428/24826; Y10T428/24934; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249997; Y10T428/27
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
82 words
An article suitable for wiping surfaces, said article comprising a sheet substrate carrying a liquid active material and having (a) a core of bulky high-porosity fibrous sheet material having a base weight of at least 30 g/m 2 , said core containing said liquid active material, (b) at least one external wiping surface having open areas and having flattened areas of thermoplastic fibres coalesced by the application of heat and pressure to such an extent as substantially to lose their fibrous identity.
Claim 2
Dependent Claim
82 words
An article suitable for wiping surfaces, said article comprising a sheet substrate carrying a liquid active material and having (a) a core of bulky high-porosity fibrous sheet material having a base weight of at least 30 g/m 2 , said core containing said liquid active material, (b) at least one external wiping surface having open areas and having flattened areas of thermoplastic fibres coalesced by the application of heat and pressure to such an extent as substantially to lose their fibrous identity.
Claim 3
Dependent Claim
23 words
The article of claim 1, wherein the core material (a) comprises paper or nonwoven fabric having a porosity of from 80 to 99%.
Claim 4
Dependent Claim
23 words
The article of claim 2, wherein the core material (a) comprises paper or nonwoven fabric having a porosity of from 85 to 95%.
Claim 5
Dependent Claim
16 words
The article of claim 1, wherein the core material (a) comprises lofty paper or nonwoven fabric.
Claim 6
Dependent Claim
22 words
The article of claim 1, wherein the core material (a) has a base weight of from 40 to 150 g/m 2 .
Claim 7
Dependent Claim
125 words
An article suitable for wiping surfaces, said article comprising a sheet substrate carrying a liquid active material and having (a) a core of bulky high-porosity fibrous sheet material having a base weight of at least 30 g/m 2 , said core containing said liquid active material, (b) an outer surface layer of heat-sealable fibrous sheet material containing at least 30% by weight of thermoplastic fibres and having a base weight of from 8 to 25 g/m 2 , fusion-bonded to said core by the application of heat and pressure to such an extent that thermoplastic fibres at its outer surface substantially lose their fibrous identity and are coalesced into fattened areas, whereby an external wiping surface having said flattened areas and open areas is provided.
Claim 8
Dependent Claim
125 words
An article suitable for wiping surfaces, said article comprising a sheet substrate carrying a liquid active material and having (a) a core of bulky high-porosity fibrous sheet material having a base weight of at least 30 g/m 2 , said core containing said liquid active material, (b) an outer surface layer of heat-sealable fibrous sheet material containing at least 30% by weight of thermoplastic fibres and having a base weight of from 8 to 25 g/m 2 , fusion-bonded to said core by the application of heat and pressure to such an extent that thermoplastic fibres at its outer surface substantially lose their fibrous identity and are coalesced into fattened areas, whereby an external wiping surface having said flattened areas and open areas is provided.
Claim 9
Dependent Claim
26 words
The article of claim 6, wherein said heat-sealable fibrous sheet material has a base weight within the range of from 10 to 20 g/m 2 .
Claim 10
Dependent Claim
15 words
The article of claim 6, wherein said heat-sealable fibrous sheet material comprises dry-laid nonwoven fabric.
Claim 11
Dependent Claim
15 words
The article of claim 1, wherein the substrate is impregnated with the liquid active material.
Claim 12
Dependent Claim
16 words
The article of claim 1, wherein the substrate carries the liquid active material in controlled-release form.
Claim 13
Dependent Claim
31 words
The article of claim 10, wherein the liquid active material is carried by the substrate within a controlled-release medium that will release liquid active material on the application of pressure thereto.
Claim 14
Dependent Claim
26 words
The article of claim 10, wherein the liquid active material is carried by the substrate within a controlled-release medium sandwiched between it and a second substrate.
Claim 15
Dependent Claim
29 words
The article of claim 10, wherein the liquid active material is carried within a controlled-release medium selected from the group consisting of highly porous polymers, microcapsules, and combinations thereof.
Claim 16
Dependent Claim
47 words
The article of claim 1, wherein the liquid active material comprises a homogeneous aqueous solution having a surface tension of less than 45 mNm -1 which, when applied to a surface and allowed to dry, dries substantially without forming discrete droplets or particles larger than 0.25 μm.
Claim 17
Dependent Claim
26 words
The article of claim 1, wherein the liquid active composition includes an ingredient selected from the group consisting of nonionic surfactants, lower alcohols and mixtures thereof.
Claim 18
Dependent Claim
17 words
The article of claim 6, wherein said heat-sealable fibrous sheet material comprises both thermoplastic and non-thermoplastic fibers.
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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) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |