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US5861056A
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Water-based magenta INK composition and ink-jet recording process employing the same
Assignee: Brother Industries Ltd
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Filing: 1996-11-12
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Granted: 1999-01-19
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Expires: 2016-11-12
Abstract
Abstract A water-based magenta ink composition comprising an aqueous medium, a magenta dye dissolved therein and a pH adjuster, where, as the magenta dye, Color Index Number Acid Red 52 is used; as the pH adjuster, a basic organic compound is used; and the pH of the water-based magenta composition is adjusted to a value within the range of from 8 to 10.
Inventors
- 👤 Hideto Yamazaki
- 👤 Masaya Fujioka
- 👤 Takeo Kitahara
- 👤 Masahito Kato
- 👤 Shunichi Higashiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:01
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/328
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
79 words
A water-based magenta ink composition comprising an aqueous medium, a magenta dye dissolved therein and a pH adjuster; wherein said magenta dye is Color Index Number Acid Red 52, said pH adjuster is a basic organic compound, and the pH of the ink composition is within the range of from 8 to 10, said basic organic compound being used in an amount necessary to adjust the pH of the ink composition within the range of from 8 to 10.
Claim 2
Dependent Claim
79 words
A water-based magenta ink composition comprising an aqueous medium, a magenta dye dissolved therein and a pH adjuster; wherein said magenta dye is Color Index Number Acid Red 52, said pH adjuster is a basic organic compound, and the pH of the ink composition is within the range of from 8 to 10, said basic organic compound being used in an amount necessary to adjust the pH of the ink composition within the range of from 8 to 10.
Claim 3
Dependent Claim
42 words
The water-based magenta ink composition according to claim 1, wherein said Color Index Number Acid Red 52 is contained in an amount of from 0.1% by weight to 5% by weight based on the total weight of the water-based magenta ink composition.
Claim 4
Dependent Claim
24 words
The water-based magenta ink composition according to claim 1, wherein said pH adjuster is selected from the group consisting of tris(hydroxymethyl)-aminomethane, triethanolamine and 2-aminomethyl-1,3-propanediol.
Claim 5
Dependent Claim
24 words
The water-based magenta ink composition according to claim 1, wherein said aqueous medium is a mixed solvent of water and a water-soluble organic solvent.
Claim 6
Dependent Claim
15 words
The water-based magenta ink composition according to claim 4, wherein said water is deionized water.
Claim 7
Dependent Claim
37 words
The water-based magenta ink composition according to claim 5, wherein said water is contained in an amount of from 10% by weight to 70% by weight based on the total weight of the water-based magenta ink composition.
Claim 8
Dependent Claim
85 words
An ink-jet recording process comprising jetting an ink composition to a recording medium in the form of droplets to make a record, wherein; said ink composition comprises a water-based magenta ink composition comprising an aqueous medium, a magenta dye dissolved therein and a pH adjuster; wherein said magenta dye is Color Index Number Acid Red 52, said pH adjuster is a basic organic compound, and the pH of the water-based magenta composition is adjusted to a value within the range of from 8 to 10.
Claim 9
Dependent Claim
85 words
An ink-jet recording process comprising jetting an ink composition to a recording medium in the form of droplets to make a record, wherein; said ink composition comprises a water-based magenta ink composition comprising an aqueous medium, a magenta dye dissolved therein and a pH adjuster; wherein said magenta dye is Color Index Number Acid Red 52, said pH adjuster is a basic organic compound, and the pH of the water-based magenta composition is adjusted to a value within the range of from 8 to 10.
Claim 10
Dependent Claim
27 words
The ink-jet recording process according to claim 7, wherein said ink composition is jetted in the form of droplets by utilizing the vibration of a piezoelectric device.
Claim 11
Dependent Claim
25 words
The ink-jet recording process according to claim 7, wherein said ink composition is jetted in the form of droplets by the action of heat energy.
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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) | 2002-01-18 | 2002-07-20 | 2003-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-01-18 | 2006-07-20 | 2007-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-01-18 | 2010-07-20 | 2011-01-19 | $7700.00 | Window Closed / Lapsed |