Patent US6492005B1 successfully refreshed from Google Patents.
US6492005B1
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Ink jet recording sheet
Assignee: Konica Minolta Inc
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Filing: 2000-03-03
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Granted: 2002-12-10
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Expires: 2020-03-03
Abstract
Abstract An ink jet recording sheet is disclosed. The recording sheet comprises a water non-absorptive support and a porous ink absorptive layer comprising dicyandiamide polycondensation product on the support.
Inventors
- 👤 Keiji Ohbayashi
- 👤 Osamu Hatano
- 👤 Kenzo Kasahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:43
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/5227; B41M5/5245; B41M5/5254; B41M5/529
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
57 words
An ink-jet recording sheet comprising a water non-absorptive support having thereon a porous ink absorptive layer comprising inorganic pigments, a hydrophilic binder and a dicyandiamide polycondensation product selected from the group consisting of polyalkylene-dicyandiamide polycondensation products and formalin-dicyandiamide polycondensation products, wherein a weight ratio of the inorganic pigments to the hydrophilic binder is from 2:1 to 20:1.
Claim 2
Dependent Claim
57 words
An ink-jet recording sheet comprising a water non-absorptive support having thereon a porous ink absorptive layer comprising inorganic pigments, a hydrophilic binder and a dicyandiamide polycondensation product selected from the group consisting of polyalkylene-dicyandiamide polycondensation products and formalin-dicyandiamide polycondensation products, wherein a weight ratio of the inorganic pigments to the hydrophilic binder is from 2:1 to 20:1.
Claim 3
Dependent Claim
25 words
The ink-jet recording sheet of claim 1 wherein the porous ink absorptive layer further comprises a cationic fixing-agent having quaternary ammonium bases in its molecule.
Claim 4
Dependent Claim
16 words
The ink jet recording sheet of claim 2 wherein the cationic fixing-agent is a cationic polymer.
Claim 5
Dependent Claim
17 words
The ink jet recording sheet of claim 2 wherein the cationic fixing-agent is a silane coupling agent.
Claim 6
Dependent Claim
20 words
The ink-jet recording sheet of claim 1 wherein the porous ink absorptive layer further comprises boric acids or its salt.
Claim 7
Dependent Claim
19 words
The ink-jet recording sheet of claim 1 wherein the porous ink absorptive layer further comprises water-soluble polyvalent metal ion.
Claim 8
Dependent Claim
19 words
The ink-jet recording sheet of claim 1 wherein the porous ink absorptive layer further comprises a water-soluble reducing agent.
Claim 9
Dependent Claim
18 words
The ink-jet recording sheet of claim 1 wherein the porous ink absorptive layer further comprises a sulfur-containing compound.
Claim 10
Dependent Claim
18 words
The ink-jet recording sheet of claim 1 wherein the porous ink absorptive layer further comprises a hydrophobic antioxidant.
Claim 11
Dependent Claim
18 words
The ink-jet recording sheet of claim 1 wherein the porous ink absorptive layer further comprises a latex-based polymer.
Claim 12
Dependent Claim
17 words
The ink-jet recording sheet of claim 1 wherein the dicyandiamide polycondensation product is a polyalkylene-dicyandiamide polycondensation product.
Claim 13
Dependent Claim
25 words
The ink-jet recording sheet of claim 1 , wherein the water non-absorptive support is a paper support which is laminated with polyethylene on both surfaces.
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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) | 2005-12-09 | 2006-06-10 | 2006-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-12-09 | 2010-06-10 | 2010-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-12-09 | 2014-06-10 | 2014-12-10 | $7700.00 | Window Closed / Lapsed |