Patent US4379804A successfully refreshed from Google Patents.
US4379804A
Expired / Lapsed
US
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Liquid sorbent materials
Assignee: 3M Co
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Filing: 1980-09-17
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Granted: 1983-04-12
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Expires: 2000-09-17
Abstract
Abstract Composite, liquid-sorbent media which can be applied to various substrates to provide improved liquid-sorbent materials. The composite media comprise a liquid-sorbent underlayer and, overlying said underlayer, a liquid-permeable surface layer, the liquid sorptivity of said underlayer being greater than the liquid sorptivity of said surface layer. Transparent sheets having the liquid-sorbent composite media coated on the surface are described as a preferred embodiment of the invention.
Inventors
- 👤 John F. Eisele
- 👤 Elizabeth A. Mercer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:23
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/04; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B41; B41M; B41M5/00; B41M5/50; B41M5/502; B41M5/506; B41M5/52; C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J7/046; B41M5/508; B41M5/5236; B41M5/5254; C08J2367/00; C08J2367/02; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
67 words
A composite medium for sorbing liquids comprising, in combination, a liquid-sorbent underlayer and, overlying said underlayer, a liquid-permeable surface layer capable of retaining its integrity in contact with said liquid and liquid applying means, the liquid sorptivity of said underlayer being greater than the liquid sorptivity of said surface layer whereby the composite medium has a sorption time less than the sorption time of said surface layer.
Claim 2
Dependent Claim
67 words
A composite medium for sorbing liquids comprising, in combination, a liquid-sorbent underlayer and, overlying said underlayer, a liquid-permeable surface layer capable of retaining its integrity in contact with said liquid and liquid applying means, the liquid sorptivity of said underlayer being greater than the liquid sorptivity of said surface layer whereby the composite medium has a sorption time less than the sorption time of said surface layer.
Claim 3
Dependent Claim
22 words
A composite medium according to claim 1 wherein a liquid permeable primer layer is interposed between said surface layer and said underlayer.
Claim 4
Dependent Claim
23 words
An article comprising a substrate having adhered to at least a portion of one surface thereof the composite, liquid-sorbent medium of claim 2.
Claim 5
Dependent Claim
23 words
An article comprising a substrate having adhered to at least a portion of one surface thereof the composite, liquid-sorbent medium of claim 1.
Claim 6
Dependent Claim
17 words
An article according to claim 4 wherein said surface layer is less than about 10 micrometers thick.
Claim 7
Dependent Claim
13 words
An article according to claim 4 wherein said liquid comprises a polar liquid.
Claim 8
Dependent Claim
34 words
An article according to claim 4 wherein said substrate is a sheet and wherein said composite, liquid-sorbent medium is adhered to at least a portion of at least one major surface of said sheet.
Claim 9
Dependent Claim
13 words
An article according to claim 7 wherein said sheet is a paper sheet.
Claim 10
Dependent Claim
30 words
A sheet according to claim 7 wherein said liquid-permeable surface layer is a polymeric resin selected from the group consisting of cellulose acetate/butyrate, gelatin, polyvinyl alcohol, polyvinyl acetate and polyvinylpyrrolidone.
Claim 11
Dependent Claim
29 words
A sheet according to claim 7 wherein said liquid-sorbent underlayer is a polymeric resin selected from the group consisting of poly(methyl vinyl ether/mono methyl maleate), gelatin, and polyvinyl pyrrolidone.
Claim 12
Dependent Claim
13 words
An article according to claim 7 wherein said sheet is a polymeric sheet.
Claim 13
Dependent Claim
12 words
An article according to claim 11 wherein said polymeric sheet is transparent.
Claim 14
Dependent Claim
15 words
A sheet according to claim 12 wherein said transparent, polymeric sheet is a polyester sheet.
Claim 15
Dependent Claim
56 words
A substantially transparent, ink-receptive sheet comprising a transparent polyester sheet and, adhered to at least a portion of at least one major surface thereof, a composite, organic liquid-sorbent medium comprising a layer of poly(methyl vinyl ether/monomethyl maleate) adhered to said sheet and, in overlying, intimate contact therewith, a thin surface layer comprising cellulose acetate butyrate polymer.
Claim 16
Dependent Claim
56 words
A substantially transparent, ink-receptive sheet comprising a transparent polyester sheet and, adhered to at least a portion of at least one major surface thereof, a composite, organic liquid-sorbent medium comprising a layer of poly(methyl vinyl ether/monomethyl maleate) adhered to said sheet and, in overlying, intimate contact therewith, a thin surface layer comprising cellulose acetate butyrate polymer.
Claim 17
Dependent Claim
19 words
A sheet according to claim 14 wherein a primer is interposed between said first layer and said polyester sheet.
Claim 18
Dependent Claim
89 words
An imaging system comprising an organic imaging liquid, a substrate having an imaging surface, and an imaging liquid application means, wherein the improvement comprises a composite imaging surface comprising, in combination, a liquid-sorbent underlayer and, overlying said underlayer, a liquid-permeable surface layer capable of retaining its integrity in contact with said liquid and said application means, the liquid sorptivity of said underlayer being greater than the liquid-sorptivity of said surface layer, whereby the composite imaging surface has a sorption time less than the sorption time of said surface layer.
Claim 19
Dependent Claim
89 words
An imaging system comprising an organic imaging liquid, a substrate having an imaging surface, and an imaging liquid application means, wherein the improvement comprises a composite imaging surface comprising, in combination, a liquid-sorbent underlayer and, overlying said underlayer, a liquid-permeable surface layer capable of retaining its integrity in contact with said liquid and said application means, the liquid sorptivity of said underlayer being greater than the liquid-sorptivity of said surface layer, whereby the composite imaging surface has a sorption time less than the sorption time of said surface layer.
References Cited (Backward Citations)
US3661874A
Cited
US4225652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |