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Patent US5421871A successfully refreshed from Google Patents.
US5421871A
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Ink composition for ink jet recording and process for producing the same
Assignee: Seiko Epson Corp
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Filing: 1993-10-01
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Granted: 1995-06-06
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Expires: 2013-10-01
Abstract
Abstract An ink composition for ink jet recording comprising a dye, 1 to 10% by weight of glycerin, 1 to 5% by weight of a monohydric alcohol having 4 or less carbon atoms, 0.5 to 10% by weight of 1,3-dimethyl-2-imidazolidinone and 75 to 95% by weight of water. The ink composition of the present invention can offer a good balance of properties required of the ink jet recording ink, especially quality of the print, dryability of the print, water-resistance of the print, storage stability and a property that does not attack members constituting a recording head and an ink passage.
Inventors
- 👤 Hiroyuki Onishi
- 👤 Kiyohiko Takemoto
- 👤 Etsuko Yoshiike
- 👤 Naomi Serizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:57
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
57 words
An ink composition for ink jet recording comprising 0.01% by weight or more of C.I. Direct Black 168 or 154, 1 to 10% by weight of glycerin, 1 to 10% by weight of a monohydric alcohol having 4 or less carbon atoms, 0.5 to 10% by weight of 1,3-dimethyl-2-imidazolidinone and 75 to 95% by weight of water.
Claim 2
Dependent Claim
57 words
An ink composition for ink jet recording comprising 0.01% by weight or more of C.I. Direct Black 168 or 154, 1 to 10% by weight of glycerin, 1 to 10% by weight of a monohydric alcohol having 4 or less carbon atoms, 0.5 to 10% by weight of 1,3-dimethyl-2-imidazolidinone and 75 to 95% by weight of water.
Claim 3
Dependent Claim
20 words
An ink composition according to claim 1, which further comprises a dye other than C.I. Direct Black 168 and 154.
Claim 4
Dependent Claim
19 words
An ink composition according to claim 1, wherein the monohydric alcohol having 4 or less carbon atoms is ethanol.
Claim 5
Dependent Claim
23 words
An ink composition according to claim 1, wherein the ratio of 1,3-dimethyl-2-imidazolidinone to glycerin is in the range of from 2:1 to 1:5.
Claim 6
Dependent Claim
40 words
A process for producing an ink composition according to claim 1, comprising adding a monohydric alcohol having 4 or less carbon atoms at a temperature of 40° C. or below to a mixture comprising a dye, glycerin, 1,3-dimethyl-2-imidazolidinone and water.
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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) | 1998-06-05 | 1998-12-05 | 1999-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-05 | 2002-12-05 | 2003-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-05 | 2006-12-05 | 2007-06-06 | $7700.00 | Window Closed / Lapsed |