US5538548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording ink containing pigment particles
Assignee: Brother Industries Ltd
•
Filing: 1995-05-30
•
Granted: 1996-07-23
•
Expires: 2015-05-30
Abstract
Abstract A recording ink containing a pigment as a coloring agent, which is dispersed in an ink solvent, the pigment having a primary particle size of not larger than 30 nm, a DBP absorption of at least 75 ml/100 g, a specific surface area in a range of 100-300 m2/g, and a tinting strength of at least 100.
Inventors
- 👤 Hideto Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:35
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/322; C09D11/36
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
72 words
A recording ink comprising a pigment dispersed in a low-volatility organic solvent selected from the group consisting of propylene glycol and its derivatives, aliphatic hydrocarbons, and dibasic acid esters, wherein said pigment has a primary particle size of not larger than 30 nm, a DBP absorption of at least 75 ml/100 g, a specific surface area in a range of 100-300 m 2 /g and a tinting strength of at least 100.
Claim 2
Dependent Claim
72 words
A recording ink comprising a pigment dispersed in a low-volatility organic solvent selected from the group consisting of propylene glycol and its derivatives, aliphatic hydrocarbons, and dibasic acid esters, wherein said pigment has a primary particle size of not larger than 30 nm, a DBP absorption of at least 75 ml/100 g, a specific surface area in a range of 100-300 m 2 /g and a tinting strength of at least 100.
Claim 3
Dependent Claim
13 words
A recording ink according to claim 1, wherein said pigment comprises carbon black.
Claim 4
Dependent Claim
33 words
A recording ink according to claim 1, which is used in an ink jetting device for jetting the ink through a nozzle formed therethrough, so as to effect printing on a recording medium.
Claim 5
Dependent Claim
14 words
A recording ink according to claim 1, comprising 3-20% by weight of said pigment.
Claim 6
Dependent Claim
18 words
A recording ink according to claim 1, further comprising a dispersant for dispersing said pigment in said solvent.
Claim 7
Dependent Claim
21 words
A recording ink according to claim 5, comprising 3-20% by weight of said pigment, and 1-15% by weight of said dispersant.
Claim 8
Dependent Claim
15 words
A recording ink according to claim 1, further comprising 1-10% by weight of a resin.
Claim 9
Dependent Claim
56 words
A recording ink comprising a pigment dispersed in water and a wetting agent, wherein said pigment has a primary particle size of not larger than 25 nm, a DPB absorption of at least 75 ml/100 g, a specific surface area in a range of 100-300 m 2 /g, and a tinting strength of at least 100.
Claim 10
Dependent Claim
56 words
A recording ink comprising a pigment dispersed in water and a wetting agent, wherein said pigment has a primary particle size of not larger than 25 nm, a DPB absorption of at least 75 ml/100 g, a specific surface area in a range of 100-300 m 2 /g, and a tinting strength of at least 100.
Claim 11
Dependent Claim
13 words
A recording ink according to claim 8, wherein said wetting agent is glycol.
Claim 12
Dependent Claim
13 words
A recording ink according to claim 8, wherein said pigment comprises carbon black.
Claim 13
Dependent Claim
33 words
A recording ink according to claim 8, which is used in an ink jetting device for jetting the ink through a nozzle formed therethrough, so as to effect printing on a recording medium.
Claim 14
Dependent Claim
14 words
A recording ink according to claim 8, comprising 3-20% by weight of said pigment.
Claim 15
Dependent Claim
18 words
A recording ink according to claim 8, further comprising a dispersant for dispersing said pigment in said water.
Claim 16
Dependent Claim
21 words
A recording ink according to claim 13, comprising 3-20% by weight of said pigment, and 1-15% by weight of said dispersant.
Claim 17
Dependent Claim
15 words
A recording ink according to claim 8, further comprising 1-10% by weight of a resin.
Claim 18
Dependent Claim
64 words
A recording ink comprising a pigment dispersed in a solvent, wherein said pigment has a primary particle size of not larger than 25 nm, a DBP absorption of at least 75 ml/100 g, a specific surface area in a range that is greater than 150 m 2 /g and not more than 300 m 2 /g, and a tinting strength of a least 100.
Claim 19
Dependent Claim
64 words
A recording ink comprising a pigment dispersed in a solvent, wherein said pigment has a primary particle size of not larger than 25 nm, a DBP absorption of at least 75 ml/100 g, a specific surface area in a range that is greater than 150 m 2 /g and not more than 300 m 2 /g, and a tinting strength of a least 100.
References Cited (Backward Citations)
US4339763A
Cited
US4164423A
Cited
US5159349A
Cited
US5016028A
Cited
US5288160A
Cited
US5407474A
Cited
US5376169A
Cited
US5417747A
Cited
US5439514A
Cited
US5443628A
Cited
US5443628B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-23 | 2000-01-22 | 2000-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-23 | 2004-01-22 | 2004-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-23 | 2008-01-22 | 2008-07-23 | $7700.00 | Window Closed / Lapsed |