Patent US5098476A successfully refreshed from Google Patents.
US5098476A
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Additive to aqueous-based inks to improve print quality
Assignee: HP Inc
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Filing: 1990-03-15
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Granted: 1992-03-24
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Expires: 2010-03-15
Abstract
Abstract A method for improving the print quality of ink used in ink-jet printers, particularly thermal ink-jet printers, is provided. For an ink typically comprising about 90 to 98 wt % water and about 10 to 2 wt % diethylene glycol plus about 0.1 to 12 wt % dye, the improvement is achieved by adding an additive consisting essentially of about 1 to 30 wt % ethanol, about 1 to 30 wt % n-propanol, about 1 to 10 wt % iso-propanol, or about 0.002 to 0.05 wt % of 2,5,8,11-tetramethyl-6-dodecyn-5,8-diol.
Inventors
- 👤 Jeffrey P. Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:10
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
A thermal ink-jet composition having a surface tension in the range of about 45 to 60 dyne/cm, substantially uniform drop size, and capable of operating at printer frequencies approaching 6 kHz, consisting essentially of (a) an additive selected from the group consisting of about 1 to 6 wt% of ethanol, about 1 to 6 wt% of n-propanol, about 1 to 5 wt% of iso-propanol, and about 0.002 to 0.05 wt% of 2,5,8,11-tetramethyl-6-dodecyn-5,8-diol, (b) about 0.1 to 12 wt% of a dye, and (c) a vehicle consisting essentially of about 90 to 90% water and the balance a water-miscible organic compound selected from the group consisting of diethylene glycol, propylene glycol, and 2-pyrrolidone.
Claim 2
Dependent Claim
112 words
A thermal ink-jet composition having a surface tension in the range of about 45 to 60 dyne/cm, substantially uniform drop size, and capable of operating at printer frequencies approaching 6 kHz, consisting essentially of (a) an additive selected from the group consisting of about 1 to 6 wt% of ethanol, about 1 to 6 wt% of n-propanol, about 1 to 5 wt% of iso-propanol, and about 0.002 to 0.05 wt% of 2,5,8,11-tetramethyl-6-dodecyn-5,8-diol, (b) about 0.1 to 12 wt% of a dye, and (c) a vehicle consisting essentially of about 90 to 90% water and the balance a water-miscible organic compound selected from the group consisting of diethylene glycol, propylene glycol, and 2-pyrrolidone.
Claim 3
Dependent Claim
16 words
The ink composition of claim 1 wherein the concentration of said 2,5,8,11-tetramethyl-6-dodecyn-5,8-diol is about 0.01 wt%.
Claim 4
Dependent Claim
113 words
In a method of printing from a thermal ink-jet printer onto a medium, wherein an ink is jetted from a pen mounted on said printer, the improvement comprising employing as the ink a composition comprising (a) an additive selected from the group consisting of about 1 to 6 wt% of ethanol, about 1 to 6 wt% of n-propanol, about 1 to 5 wt% of iso-propanol, and about 0.002 to 0.05 wt% of 2,5,8,11-tetramethyl-6-dodecyn-5,8-diol, (b) about 0.1 to 12 wt% of a dye, and (c) a vehicle consisting essentially of about 90 to 98% water and the balance a water-miscible organic compound selected from the group consisting of diethylene glycol, propylene glycol, and 2-pyrrolidone.
Claim 5
Dependent Claim
113 words
In a method of printing from a thermal ink-jet printer onto a medium, wherein an ink is jetted from a pen mounted on said printer, the improvement comprising employing as the ink a composition comprising (a) an additive selected from the group consisting of about 1 to 6 wt% of ethanol, about 1 to 6 wt% of n-propanol, about 1 to 5 wt% of iso-propanol, and about 0.002 to 0.05 wt% of 2,5,8,11-tetramethyl-6-dodecyn-5,8-diol, (b) about 0.1 to 12 wt% of a dye, and (c) a vehicle consisting essentially of about 90 to 98% water and the balance a water-miscible organic compound selected from the group consisting of diethylene glycol, propylene glycol, and 2-pyrrolidone.
Claim 6
Dependent Claim
16 words
In the method of claim 3 wherein the concentration of said 2,5,8,11-tetramethyl-6-dodecyn-5,8-diol is about 0.1 wt%.
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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) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |