US6619791B2
Expired / Lapsed
US
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Aqueous ink, organic pigment powder, ink cartridge, recording unit and ink-jet recording apparatus
Assignee: Canon Inc
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Filing: 2002-01-24
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Granted: 2003-09-16
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Expires: 2022-01-24
Abstract
Abstract Aqueous pigment ink and organic pigment powder are used for ink-jet recording to form high quality images. Organic pigment powder is prepared by finely granulating an organic pigment containing anthraquinone as principal ingredient by means of a vapor phase method to such an extent that the produced powder shows a number average particle diameter of primary particles of 10 to 50 nm. An aqueous ink contains such organic pigment powder.
Inventors
- 👤 Shinichi Tochihara
- 👤 Shoji Koike
- 👤 Masaaki Hiro
- 👤 Koromo Shirota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:43
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/322; C09B; C09B67/00; C09B67/0071; C09B67/0092; C09B67/0095
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
40 words
An aqueous ink comprising an organic pigment micro-granulated by means of a vapor phase method, the pigment containing anthraquinone as principal ingredient, wherein the organic pigment has a number average particle diameter of primary particles of 10 to 50 nm.
Claim 2
Dependent Claim
40 words
An aqueous ink comprising an organic pigment micro-granulated by means of a vapor phase method, the pigment containing anthraquinone as principal ingredient, wherein the organic pigment has a number average particle diameter of primary particles of 10 to 50 nm.
Claim 3
Dependent Claim
23 words
An aqueous ink according to claim 1 , wherein said organic pigment has a hydrophilic group introduced by means of a plasma treatment.
Claim 4
Dependent Claim
15 words
An aqueous ink according to claim 2 , wherein the hydrophilic group is carboxyl group.
Claim 5
Dependent Claim
51 words
An aqueous ink according to claim 2 , wherein said organic pigment is obtained by successively conducting the process of micro-granulation of the organic pigment by means of a vapor phase method and a process of introducing a hydrophilic group into the micro-granulated organic pigment by means of a plasma treatment.
Claim 6
Dependent Claim
37 words
An aqueous ink according to claim 1 , wherein said organic pigment in the ink has a volume average particle diameter of 20 to 70 nm and a particle diameter distribution range of 10 to 300 nm.
Claim 7
Dependent Claim
27 words
An aqueous ink according to claim 1 , wherein said organic pigment is selected from the group consisting of C.I. Pigment Yellow 23, 108, 147 and 199.
Claim 8
Dependent Claim
27 words
An aqueous ink according to claim 1 , wherein the total concentration of polyvalent metals and silicon in the organic pigment is not higher than 20 ppm.
Claim 9
Dependent Claim
19 words
An aqueous ink according to claim 1 , wherein the aqueous ink is to be used for ink-jet recording.
Claim 10
Dependent Claim
25 words
An aqueous ink according to claim 8 , wherein the ink-jet recording comprises a step of applying thermal energy to ink to eject the ink.
Claim 11
Dependent Claim
24 words
A recording unit comprising: an ink container containing an aqueous ink according to claim 8 and an ink-jet recording head for ejecting the ink.
Claim 12
Dependent Claim
25 words
An ink-jet recording apparatus comprising: an ink container containing an aqueous ink according to claim 8 and an ink-jet recording head for ejecting the ink.
Claim 13
Dependent Claim
12 words
An ink cartridge containing an aqueous ink according to claim 1 .
Claim 14
Dependent Claim
50 words
Organic pigment powder containing anthraquinone as principal ingredient, the powder being micro-granulated by means of a vapor phase method, wherein said organic pigment powder has a number average particle diameter of primary particles of 10 to 50 nm and has a hydrophilic group introduced by means of a plasma treatment.
Claim 15
Dependent Claim
50 words
Organic pigment powder containing anthraquinone as principal ingredient, the powder being micro-granulated by means of a vapor phase method, wherein said organic pigment powder has a number average particle diameter of primary particles of 10 to 50 nm and has a hydrophilic group introduced by means of a plasma treatment.
Claim 16
Dependent Claim
15 words
Organic pigment powder according to claim 13 , wherein the hydrophilic group is carboxyl group.
Claim 17
Dependent Claim
27 words
Organic pigment powder according to claim 13 , wherein said organic pigment is selected from the group consisting of C.I. Pigment Yellow 23, 108, 147 and 199.
Claim 18
Dependent Claim
28 words
Organic pigment powder according to claim 13 , wherein the total concentration of polyvalent metals and silicon in the organic pigment powder is not higher than 20 ppm.
Claim 19
Dependent Claim
37 words
Organic pigment powder according to claim 13 , having been successively subjected to a vapor phase method for micro-granulation of the organic pigment, and a plasma treatment for introduction of a hydrophilic group to the micro-granulated pigment.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2006-09-15 | 2007-03-17 | 2007-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-09-15 | 2011-03-17 | 2011-09-16 | $3760.00 | Window Closed / Lapsed |
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