US4285727A
Expired / Lapsed
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Ink compositions for ink jet recoding
Assignee: Konica Minolta Inc
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Filing: 1979-12-14
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Granted: 1981-08-25
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Expires: 1999-12-14
Abstract
Abstract An ink composition for ink jet recording is disclosed which contains a water soluble dye, polyhydric alcohol, and potassium carbonate in an aqueous medium.
Inventors
- 👤 Masafumi Uehara
- 👤 Mitsuyoshi Itano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:52
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
An ink composition for ink jet recording which consists essentially of an aqueous medium, 0.5 to 8% by weight of a water-soluble acid or direct dye, 45 to 70% by weight of a polyhydric alcohol having 2 to 6 carbon atoms, and an amount of potassium carbonate effective to improve the storability of said composition.
Claim 2
Dependent Claim
55 words
An ink composition for ink jet recording which consists essentially of an aqueous medium, 0.5 to 8% by weight of a water-soluble acid or direct dye, 45 to 70% by weight of a polyhydric alcohol having 2 to 6 carbon atoms, and an amount of potassium carbonate effective to improve the storability of said composition.
Claim 3
Dependent Claim
25 words
An ink composition for ink jet recording according to claim 1, wherein the composition comprises 1.0-5% by weight of a water-soluble acid or direct dye.
Claim 4
Dependent Claim
43 words
An ink composition for ink jet recording according to claim 1, wherein the polyhydric alcohols is selected from the group consisting of ethylene glycol, propylene glycol, trimethylene glycol, glycerine, 1,3-butanediol, 2,3-butanediol, 1,4-butanediol, diethylene glycol, 1,5-pentanediol, hexylene glycol, triethylene glycol, dipropylene glycol and 1,2,6-hexanetriol.
Claim 5
Dependent Claim
21 words
An ink composition for ink jet recording according to claim 1, wherein the composition contains 0.1-2% by weight of potassium carbonate.
Claim 6
Dependent Claim
18 words
An ink composition for ink jet recording according to claim 1, wherein the composition further contains a preservative.
Claim 7
Dependent Claim
21 words
An ink composition for ink jet recording according to claim 5, wherein the composition contains 0.01-0.5% by weight of the preservative.
Claim 8
Dependent Claim
20 words
An ink composition for ink jet recording according to claim 1, wherein the composition further contains a surface active agent.
Claim 9
Dependent Claim
23 words
An ink composition for ink jet recording according to claim 7, wherein the composition contains 0.05-0.5% by weight of the surface active agent.
Claim 10
Dependent Claim
19 words
An ink composition for ink jet recording according to claim 1, wherein the composition further contains a chelating agent.
Claim 11
Dependent Claim
35 words
An ink composition for ink jet recording according to claim 9, wherein the chelating agent is selected from the group consisting of sodium gluconate, ethylenediaminetetraacetic acid, disodium ethylenediaminetetraacetate, trisodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate or sodium diethylenetriaminepentaacetate.
Claim 12
Dependent Claim
22 words
An ink composition for ink jet recording according to claim 9, wherein the composition contains 0.1-1% by weight of the chelating agent.
Claim 13
Dependent Claim
20 words
A composition according to claim 1 containing 0.1 to 5.0% of said potassium carbonate by weight based on said composition.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |