Patent US5707716A successfully refreshed from Google Patents.
US5707716A
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Recording medium
Assignee: Canon Inc
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Filing: 1995-10-24
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Granted: 1998-01-13
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Expires: 2015-10-24
Abstract
Abstract A recording medium is provided which is constituted of a base material and an ink-receiving layer formed on the base material and containing alumina hydrate of a boehmite structure, or is constituted of a fibrous material and alumina hydrate of a boehmite structure incorporated therein. The alumina hydrate in the ink-receiving layer or the fibrous material has an interplanar spacing of (020) plane of exceeding 0.617 nm but not more than 0.620 nm, and crystallite size in a direction perpendicular to (010) plane ranging from 6.0 to 10.0 nm.
Inventors
- 👤 Hitoshi Yoshino
- 👤 Kyo Miura
- 👤 Takeo Eguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:26
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/5218; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24942; Y10T428/249921; Y10T428/249953; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/26; Y10T428/27; Y10T428/273; Y10T428/31; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
70 words
A recording medium containing alumina hydrate of a boehmite structure, in which an interplanar spacing of (020) plane of the alumina hydrate exceeds 0.617 nm but not more than 0.620 nm, and the crystallite size in a direction perpendicular to (010) plane ranges from 6.0 to 10.0 nm, wherein the alumina hydrate is contained in an ink-receiving layer provided on a base material, or is incorporated in a fibrous substrate.
Claim 2
Dependent Claim
70 words
A recording medium containing alumina hydrate of a boehmite structure, in which an interplanar spacing of (020) plane of the alumina hydrate exceeds 0.617 nm but not more than 0.620 nm, and the crystallite size in a direction perpendicular to (010) plane ranges from 6.0 to 10.0 nm, wherein the alumina hydrate is contained in an ink-receiving layer provided on a base material, or is incorporated in a fibrous substrate.
Claim 3
Dependent Claim
106 words
The recording medium containing alumina hydrate of a boehmite structure according to claim 1, wherein the alumina hydrate comprises at least one kind of alumina hydrate having a boehmite structure having an interplanar spacing of (020) plane of not more than 0.617 nm and at least one other kind of alumina hydrate of a boehmite structure having an interplanar spacing of (020) plane of not less than 0.620 nm, and having, as a whole, an interplanar spacing of (020) plane exceeding 0.617 nm but not more than 0.620 nm, and crystallite size in a direction perpendicular to (010) plane direction ranging from 6.0 to 10.0 nm.
Claim 4
Dependent Claim
53 words
The recording medium according to claim 2, wherein the alumina hydrate having an interplanar spacing of (020) plane of not more than 0.617 nm and the alumina hydrate having an interplanar spacing of (020) plane of not less than 0.620 nm are mixed in a ratio ranging from 10:1 to 1:10 by weight.
Claim 5
Dependent Claim
53 words
The recording medium according to claim 3, wherein the alumina hydrate having an interplanar spacing of (020) plane of not more than 0.617 nm and the alumina hydrate having an interplanar spacing of (020) plane of not less than 0.620 nm are mixed in a ratio ranging from 5:1 to 1:5 by weight.
Claim 6
Dependent Claim
14 words
The recording medium according to claim 1, wherein the ink-receiving layer contains a binder.
Claim 7
Dependent Claim
26 words
The recording medium according to claim 5, wherein the alumina hydrate and the binder is mixed in a ratio ranging from 5:1 to 20:1 by weight.
Claim 8
Dependent Claim
26 words
The recording medium according to claim 6, wherein the alumina hydrate and the binder is mixed in a ratio ranging from 7:1 to 15:1 by weight.
Claim 9
Dependent Claim
14 words
The recording medium according to claim 1, wherein the alumina hydrate contains titanium dioxide.
Claim 10
Dependent Claim
28 words
The recording medium according to claim 8, wherein a content of titanium dioxide ranges from 0.01% to 1.00% by weight based on the weight of the alumina hydrate.
Claim 11
Dependent Claim
20 words
The recording medium according to claim 1, wherein the alumina hydrate has an aspect ratio ranging from 3 to 10.
Claim 12
Dependent Claim
27 words
The recording medium according to claim 1, wherein the alumina hydrate has an average particle diameter or an average particle length ranging from 1 to 50 nm.
Claim 13
Dependent Claim
28 words
The recording medium according to claim 1, wherein the ink-receiving layer has a BET specific surface area ranging from 70 m 2 /g to 300 m 2 /g.
Claim 14
Dependent Claim
39 words
The recording medium according to claim 1, wherein the ink-receiving layer has an average pore radius ranging from 2.0 nm to 20.0 nm and a half width of a pore radius distribution ranging from 2.0 nm to 15.0 nm.
Claim 15
Dependent Claim
22 words
The recording medium according to claim 1, wherein the ink-receiving layer has pores having two or more peaks in pore radius distribution.
Claim 16
Dependent Claim
43 words
The recording medium according to claim 14, wherein one of the peaks is in a range of not more than 10.0 nm, and another one of the peaks is in a range of from 10.0 to 20.0 nm of the pore radius, respectively.
Claim 17
Dependent Claim
26 words
The recording medium according to claim 1, wherein the ink-receiving layer has a pore volume ranging from 0.4 m 3 /g to 0.6 cm 3 /g.
Claim 18
Dependent Claim
25 words
The recording medium according to claim 1, wherein the ink-receiving layer has a pore volume of not less than 8 cm 3 /m 2 .
Claim 19
Dependent Claim
41 words
The recording medium according to claim 1, wherein a relative pressure difference between adsorption and desorption at 90% of the maximum amount of adsorbed gas found from an isothermal nitrogen adsorption-desorption curve for the ink-receiving layer is not more than 0.2.
Claim 20
Dependent Claim
15 words
A printed recording medium comprising an image formed on the recording medium of claim 1.
Claim 21
Dependent Claim
46 words
The recording medium according to claim 1, wherein the alumina hydrate is represented by the formula Al.sub.2 O.sub.3-n (OH).sub.2n.mH.sub.2 O wherein n is an integer of 0 to 3, m is a number of from 0 to 10 and m and n are not both 0.
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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) | 2001-01-12 | 2001-07-14 | 2002-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-01-12 | 2005-07-14 | 2006-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-01-12 | 2009-07-14 | 2010-01-13 | $7700.00 | Window Closed / Lapsed |