US5463178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording sheet and process for its production
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1994-07-15
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Granted: 1995-10-31
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Expires: 2014-07-15
Abstract
Abstract A recoding sheet comprising a substrate, a porous layer of pseudo-boehmite having a thickness of from 10 to 100 μm formed on the substrate and a layer of silica gel having a thickness of from 0.1 to 30 μm formed on the porous layer of pseudo-boehmite.
Inventors
- 👤 Shinichi Suzuki
- 👤 Hitoshi Kijimuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:46
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/5218; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
50 words
A recording sheet comprising a substrate, a porous layer of pseudo-boehmite having a thickness of from 10 to 100 μm formed on the substrate and a layer of silica gel having a thickness of from 0.1 to 30 μm formed as the outermost layer on the porous layer of pseudo-boehmite.
Claim 2
Dependent Claim
50 words
A recording sheet comprising a substrate, a porous layer of pseudo-boehmite having a thickness of from 10 to 100 μm formed on the substrate and a layer of silica gel having a thickness of from 0.1 to 30 μm formed as the outermost layer on the porous layer of pseudo-boehmite.
Claim 3
Dependent Claim
27 words
The recording sheet according to claim 1, wherein the layer of silica gel has a structure consisting essentially of spherical particles of silica which are linked together.
Claim 4
Dependent Claim
22 words
The recording sheet according to claim 2, wherein the diameter of the spherical particles of silica is from 10 to 90 nm.
Claim 5
Dependent Claim
30 words
The recording sheet according to claim 1, wherein the layer of silica gel contains a binder in an amount of from 1 to 30 wt % of the silica gel.
Claim 6
Dependent Claim
41 words
The recording sheet according to claim 1, wherein the porous layer of pseudo-boehmite has a porous structure consisting essentially of pores with a radius of from 1 to 15 nm and having a pore volume of from 0.3 to 1.0 cc/g.
Claim 7
Dependent Claim
29 words
The recording sheet according to claim 1, wherein the porous layer of pseudo-boehmite contains a binder in an amount of from 5 to 50 wt % of the pseudo-boehmite.
Claim 8
Dependent Claim
17 words
The recording sheet according to claim 1, which is a recording medium for an ink jet printer.
Claim 9
Dependent Claim
19 words
The recording sheet according to claim 1, consisting essentially of said substrate, porous layer and layer of silica gel.
Claim 10
Dependent Claim
37 words
A process for producing a recording sheet, which comprises forming a porous layer of pseudo-boehmite on a substrate, and coating thereon silica sol together with a binder, followed by drying to form a layer of silica gel.
Claim 11
Dependent Claim
37 words
A process for producing a recording sheet, which comprises forming a porous layer of pseudo-boehmite on a substrate, and coating thereon silica sol together with a binder, followed by drying to form a layer of silica gel.
Claim 12
Dependent Claim
26 words
The process for producing a recording sheet according to claim 9, wherein the average particle diameter of the silica sol is from 10 to 90 nm.
Claim 13
Dependent Claim
30 words
The process for producing a recording sheet according to claim 9, wherein the binder is from 1 to 30 wt % relative to the solid content of the silica sol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-10-30 | 1999-05-01 | 1999-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-30 | 2003-05-01 | 2003-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-30 | 2007-05-01 | 2007-10-31 | $7700.00 | Window Closed / Lapsed |