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US4767459A
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Ink
Assignee: Syngenta Ltd
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Filing: 1987-09-16
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Granted: 1988-08-30
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Expires: 2007-09-16
Abstract
Abstract An ink for ink-jet printing comprising a solution of C.I. Direct Black 168.
Inventors
- 👤 David Greenwood
- 👤 John E. Presgrave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:39
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/328
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
18 words
An ink comprising the water-soluble dye which, in the form of the free acid, has the formula: ##STR2##
Claim 2
Dependent Claim
18 words
An ink comprising the water-soluble dye which, in the form of the free acid, has the formula: ##STR2##
Claim 3
Dependent Claim
25 words
An ink according to claim 1 comprising a solution of the dye in a water-soluble organic solvent or a mixture of the solvent and water.
Claim 4
Dependent Claim
18 words
An ink according to claim 2 wherein the organic solvent is a glycol or a nitrogen-containing heterocyclic ketone.
Claim 5
Dependent Claim
12 words
An ink according to claim 3 wherein the glycol is diethylene glycol.
Claim 6
Dependent Claim
12 words
An ink according to claim 3 wherein the heterocyclic ketone is N-methylpyrrolidone.
Claim 7
Independent Claim
40 words
A method of printing which comprises ejecting an ink in accordance with any one of claims 1 to 5 from a small orifice in the form of droplets directed towards a substrate on which an image is to be formed.
References Cited (Backward Citations)
DE3529495A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |