US5395431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous based jet ink
Assignee: Videojet Technologies Inc
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Filing: 1993-06-22
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Granted: 1995-03-07
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Expires: 2013-06-22
Abstract
Abstract An ink composition suitable for ink jet printing operations, comprising a colorant, water, and surfactant, said composition having a surface tension of less than about 30 dynes/cm.
Inventors
- 👤 Mohammed W. Siddiqui
- 👤 Snehal S. Desai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:11
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
An ink composition suitable for ink jet printing operations, comprising a colorant, water, and a surfactant, said composition having a surface tension of less than 30 dynes/cm, a viscosity from about 1.6 to about 7.0 centipoises at 25° C., an electrical resistivity from about 50 to about 2000 ohm-cm, and a sonic velocity from about 1200 to about 1700 meters/second, wherein the colorant is present in an amount from about 7% to about 15% by weight of the ink composition, the water is present in an amount from about 70% to about 90% by weight of the ink composition, and the surfactant is present in an amount from about 0.2% to about 0.8% by weight of the ink composition.
Claim 2
Dependent Claim
119 words
An ink composition suitable for ink jet printing operations, comprising a colorant, water, and a surfactant, said composition having a surface tension of less than 30 dynes/cm, a viscosity from about 1.6 to about 7.0 centipoises at 25° C., an electrical resistivity from about 50 to about 2000 ohm-cm, and a sonic velocity from about 1200 to about 1700 meters/second, wherein the colorant is present in an amount from about 7% to about 15% by weight of the ink composition, the water is present in an amount from about 70% to about 90% by weight of the ink composition, and the surfactant is present in an amount from about 0.2% to about 0.8% by weight of the ink composition.
Claim 3
Dependent Claim
30 words
The ink composition of claim 1, further comprising a humectant, wherein said humectant is present in an amount from about 2.5% to about 7% by weight of said ink composition.
Claim 4
Dependent Claim
30 words
The ink composition of claim 2, further comprising a resin, wherein said resin is present in an amount from about 0.2% to about 5% by weight of the ink composition.
Claim 5
Dependent Claim
119 words
An ink composition suitable for ink jet printing operations, comprising a pigment, water, and a surfactant, said composition having a surface tension of less than 30 dynes/cm, a viscosity from about 1.6 to about 7.0 centipoises at 25° C., an electrical resistivity from about 50 to about 2000 ohm-cm, and a sonic velocity from about 1200 to about 1700 meters/second, wherein the pigment is present in an amount from about 7% to about 15% by weight of the ink composition, the water is present in an amount from about 70% to about 90% by weight of the ink composition, and the surfactant is present in an amount from about 0.2% to about 0.8% by weight of the ink composition.
Claim 6
Dependent Claim
119 words
An ink composition suitable for ink jet printing operations, comprising a pigment, water, and a surfactant, said composition having a surface tension of less than 30 dynes/cm, a viscosity from about 1.6 to about 7.0 centipoises at 25° C., an electrical resistivity from about 50 to about 2000 ohm-cm, and a sonic velocity from about 1200 to about 1700 meters/second, wherein the pigment is present in an amount from about 7% to about 15% by weight of the ink composition, the water is present in an amount from about 70% to about 90% by weight of the ink composition, and the surfactant is present in an amount from about 0.2% to about 0.8% by weight of the ink composition.
Claim 7
Dependent Claim
30 words
The ink composition of claim 4, further comprising a humectant, wherein said humectant is present in an amount from about 2.5% to about 7% by weight of said ink composition.
Claim 8
Dependent Claim
30 words
The ink composition of claim 5, further comprising a resin, wherein said resin is present in an amount from about 0.2% to about 5% by weight of the ink composition.
Claim 9
Dependent Claim
47 words
A method of printing cancellation marks on a stamp, comprising forming the ink composition of claim 1 into droplets, projecting a stream of the droplets to a stamp, and controlling the direction of said stream electronically so that the droplets form a printed image on said stamp.
Claim 10
Dependent Claim
47 words
A method of printing cancellation marks on a stamp, comprising forming the ink composition of claim 4 into droplets, projecting a stream of the droplets to a stamp, and controlling the direction of said stream electronically so that the droplets form a printed image on said stamp.
Claim 11
Independent Claim
97 words
A method of printing cancellation marks on a stamp, comprising forming an ink composition comprising from about 7% to about 15% colorant by weight of said ink composition, from about 70% to about 90% water by weight of said ink composition, and from about 0.2% to about 0.8% surfactant by weight of said ink composition, said composition having a surface tension of less than about 30 dynes/cm into droplets, projecting a stream of the droplets to the stamp, and controlling the direction of said stream electronically so that the droplets form a printed image on said stamp.
Claim 12
Independent Claim
97 words
A method of printing cancellation marks on a stamp, comprising forming an ink composition comprising from about 7% to about 15% colorant by weight of said ink composition, from about 70% to about 90% water by weight of said ink composition, and from about 0.2% to about 0.8% surfactant by weight of said ink composition, said composition having a surface tension of less than about 30 dynes/cm into droplets, projecting a stream of the droplets to the stamp, and controlling the direction of said stream electronically so that the droplets form a printed image on said stamp.
Claim 13
Independent Claim
11 words
The method of clam 9, wherein the colorant is a pigment.
Claim 14
Independent Claim
11 words
The method of clam 9, wherein the colorant is a pigment.
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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) | 1998-03-06 | 1998-09-05 | 1999-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-06 | 2002-09-05 | 2003-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-06 | 2006-09-05 | 2007-03-07 | $7700.00 | Window Closed / Lapsed |