US5207825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink compositions for ink jet printing
Assignee: Xerox Corp
•
Filing: 1991-07-30
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Granted: 1993-05-04
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Expires: 2011-07-30
Abstract
Abstract Disclosed is an ink composition which comprises an aqueous liquid vehicle, a colorant, and a polymeric additive of the formula ##STR1## wherein R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl groups with from 1 to about 8 carbon atoms, and alkoxy groups with from 1 to about 8 carbon atoms, R 3 and R 4 are independently selected from the group consisting of alkyl groups with from 1 to about 4 carbon atoms, and x and y are each independently a number of from about 100 to about 400, present in an amount of at least about 1 part per million. The ink is suitable for use in ink jet printing processes, particularly thermal ink jet printing processes.
Inventors
- 👤 William M. Schwarz, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:16
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
106 words
An ink composition which comprises an aqueous liquid vehicle, a colorant, and a polymeric additive of the formula ##STR9## wherein R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl groups with from 1 to about 8 carbon atoms, and alkoxy groups with from 1 to about 8 carbon atoms, R 3 and R 4 are independently selected from the group consisting of alkyl groups with from 1 to about 4 carbon atoms, and x and y are each independently a number of from about 100 to about 400, present in an amount of at least about 1 part per million.
Claim 2
Dependent Claim
106 words
An ink composition which comprises an aqueous liquid vehicle, a colorant, and a polymeric additive of the formula ##STR9## wherein R 1 and R 2 are independently selected from the group consisting of hydrogen, alkyl groups with from 1 to about 8 carbon atoms, and alkoxy groups with from 1 to about 8 carbon atoms, R 3 and R 4 are independently selected from the group consisting of alkyl groups with from 1 to about 4 carbon atoms, and x and y are each independently a number of from about 100 to about 400, present in an amount of at least about 1 part per million.
Claim 3
Dependent Claim
23 words
An ink composition according to claim 1 wherein x and y are each independently a number of from about 100 to about 200.
Claim 4
Dependent Claim
29 words
An ink composition according to claim 1 wherein the polymeric additive is present in an amount of from about 0.0001 percent by weight to about 1 percent by weight.
Claim 5
Dependent Claim
29 words
An ink composition according to claim 1 wherein the polymeric additive is present in an amount of from about 0.0001 percent by weight to about 0.5 percent by weight.
Claim 6
Dependent Claim
32 words
An ink composition according to claim 1 wherein the polymeric additive is of the formula ##STR10## wherein x and y are each independently a number of from about 100 to about 400.
Claim 7
Dependent Claim
17 words
An ink composition according to claim 1 wherein the aqueous liquid vehicle comprises water and a humectant.
Claim 8
Dependent Claim
13 words
An ink composition according to claim 6 wherein the humectant is cyclohexyl pyrrolidone.
Claim 9
Dependent Claim
13 words
An ink composition according to claim 1 wherein the colorant is a dye.
Claim 10
Dependent Claim
13 words
An ink composition according to claim 1 wherein the colorant is a pigment.
Claim 11
Dependent Claim
44 words
An ink composition according to claim 1 wherein the liquid vehicle is present in an amount of from about 75 to about 99 percent by weight and the colorant is present in an mount of from about 1 to about 15 percent by weight.
Claim 12
Dependent Claim
22 words
An ink composition according to claim 1 wherein the polymeric additive has a molecular weight of from about 14,000 to about 22,000.
Claim 13
Dependent Claim
21 words
An ink composition according to claim 1 wherein the viscosity of the ink is from about 1 to about 5 centipoise.
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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) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |