Patent US5047084A successfully refreshed from Google Patents.
US5047084A
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Microemulsion ink jet ink composition
Assignee: HP Inc
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Filing: 1990-01-23
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Granted: 1991-09-10
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Expires: 2010-01-23
Abstract
Abstract An ink jet ink in the form of a microemulsion of an organic vehicle phase having a colorant dispersed therein and an aqueous phase containing a surfactant, the vehicle phase preferably being liquid at 70° C. and solid at 20° C.
Inventors
- 👤 Miller Robert J.
- 👤 Young S. You
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:31
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
76 words
A thermal ink jet ink composition comprising: a. a vehicle phase that is immiscible with water, having at least twelve carbon atoms per molecule and having a colorant dispersed therein, b. an aqueous phase, c. a surfactant, d. one of said vehicle phase and said aqueous phase being a continuous phase, e. the other of said vehicle phase and said aqueous phase being a discontinuous phase, f. said continuous phase and discontinuous phase constituting a microemulsion.
Claim 2
Dependent Claim
76 words
A thermal ink jet ink composition comprising: a. a vehicle phase that is immiscible with water, having at least twelve carbon atoms per molecule and having a colorant dispersed therein, b. an aqueous phase, c. a surfactant, d. one of said vehicle phase and said aqueous phase being a continuous phase, e. the other of said vehicle phase and said aqueous phase being a discontinuous phase, f. said continuous phase and discontinuous phase constituting a microemulsion.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein said aqueous phase is discontinuous.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein said vehicle phase is liquid at 70° C. and solid at 20° C.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein said vehicle phase comprises fatty acids having from about 16 to about 30 carbon atoms per molecule.
Claim 6
Dependent Claim
12 words
The composition of claim 1 wherein said vehicle phase comprises stearic acid.
Claim 7
Dependent Claim
12 words
The composition of claim 1 wherein said vehicle phase comprises myristic acid.
Claim 8
Dependent Claim
14 words
The composition of claim 1 wherein said vehicle phase comprises an esterified fatty acid.
Claim 9
Dependent Claim
13 words
The composition of claim 1 wherein said vehicle phase comprises white mineral oil.
Claim 10
Dependent Claim
13 words
The composition of claim 1 wherein said surfactant comprises polyoxyethylene (20) sorbitan monostearate.
Claim 11
Dependent Claim
20 words
The composition of claim 1 including a co-solvent in the aqueous phase that forms a cosurfactant with said vehicle phase.
Claim 12
Dependent Claim
10 words
The composition of claim 10 wherein said co-solvent comprises triethanolamine.
Claim 13
Dependent Claim
12 words
The composition of claim 1 wherein said surfactant comprises bis(2-ethylhexyl) sulfo-succinic acid.
Claim 14
Independent Claim
108 words
The method for preparing an ink jet ink comprising: a. adding a co-solvent to a vehicular phase that is immiscible with water and having at least twelve carbon atoms per molecule, b. adding surfactant to water to form an aqueous phase, c. adding said aqueous phase to said vehicle phase in an amount to form a two-phase mixture which, when emulsified, will have the aqueous phase as a discontinuous phase, d. agitating said two-phase mixture to form an emulsion, e. maintaining said emulsion at a temperature higher than the melting temperature of said vehicle phase until a microemulsion is formed, and f. adding a colorant to said emulsion.
Claim 15
Independent Claim
108 words
The method for preparing an ink jet ink comprising: a. adding a co-solvent to a vehicular phase that is immiscible with water and having at least twelve carbon atoms per molecule, b. adding surfactant to water to form an aqueous phase, c. adding said aqueous phase to said vehicle phase in an amount to form a two-phase mixture which, when emulsified, will have the aqueous phase as a discontinuous phase, d. agitating said two-phase mixture to form an emulsion, e. maintaining said emulsion at a temperature higher than the melting temperature of said vehicle phase until a microemulsion is formed, and f. adding a colorant to said emulsion.
Claim 16
Dependent Claim
21 words
The method of claim 13 wherein the volume of said vehicle phase is greater than the volume of said aqueous phase.
Claim 17
Dependent Claim
23 words
The method of claim 14 wherein said aqueous phase constitutes from about 35% to about 7% by volume of said ink jet ink.
References Cited (Backward Citations)
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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) | 1994-09-09 | 1995-03-11 | 1995-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-09 | 1999-03-11 | 1999-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-09 | 2003-03-11 | 2003-09-10 | $7700.00 | Window Closed / Lapsed |