US4490177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual color ink composition
Assignee: Sakura Color Products Corp
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Filing: 1983-10-21
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Granted: 1984-12-25
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Expires: 2003-10-21
Abstract
Abstract A method for writing or marking on an absorbent or pervious writing surface to provide a writing or marking composed of an inner portion of a first color with outer contour portions therearound of a second color, which method comprises applying to said surface a writing or marking with an ink comprising: a first colorant, a second colorant and a vehicle, said first colorant being dispersed in said vehicle and having a particle size sufficiently large so as to substantially not permeate or be absorbed into said writing surface and said second colorant being dispersed or dissolved in said vehicle, being capable of substantially permeating or being absorbed into said writing surface and diffusing into the area on said surface proximate to said writing, whereby said second colorant forms said outer contour portions around said inner portion of said first colorant.
Inventors
- 👤 Keiko Shioi
- 👤 Yukito Shoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:58
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/50
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
136 words
A method for writing on an absorbent or pervious writing surface to provide a writing composed of an inner portion of a first color with substantial outer contour portions therearound of a second color, which method comprises applying to said surface a writing with an ink comprising: a first colorant, a second colorant, a vehicle, said first colorant also being dispersed throughout said vehicle and having a particle size sufficiently large so as to substantially not permeate or be absorbed into said writing surface and said second colorant being dispersed or dissolved in said vehicle, being capable of substantially permeating or being absorbed into said writing surface and diffusing into the area on said surface proximate to said writing whereby said second colorant forms said outer contour portions around said inner portion of said first colorant.
Claim 2
Independent Claim
136 words
A method for writing on an absorbent or pervious writing surface to provide a writing composed of an inner portion of a first color with substantial outer contour portions therearound of a second color, which method comprises applying to said surface a writing with an ink comprising: a first colorant, a second colorant, a vehicle, said first colorant also being dispersed throughout said vehicle and having a particle size sufficiently large so as to substantially not permeate or be absorbed into said writing surface and said second colorant being dispersed or dissolved in said vehicle, being capable of substantially permeating or being absorbed into said writing surface and diffusing into the area on said surface proximate to said writing whereby said second colorant forms said outer contour portions around said inner portion of said first colorant.
Claim 3
Dependent Claim
33 words
The method as claimed in claim 1 wherein the first colorant is at least one member selected from the group consisting of a metal powder pigment, an inorganic pigment and an organic pigment.
Claim 4
Dependent Claim
22 words
The method as claimed in claim 1 wherein the vehicle is a mixture of water and at least one water-soluble organic solvent.
Claim 5
Dependent Claim
51 words
The method as claimed in claim 1 wherein the vehicle is a solvent including at least one member selected from the group consisting of an alicyclic hydrocarbon, an aliphatic hydrocarbon, an aromatic hydrocarbon, an aliphatic ketone, an alicyclic ketone, an aliphatic carboxylic acid alkyl ester, an aliphatic alcohol, and an ethyleneglycolmonoalkylether.
Claim 6
Dependent Claim
36 words
The method in claim 1 wherein the ink composition comprises: 35-70% by weight of the vehicle, 1-20% by weight of resin, 10-40% by weight of the first colorant, and 0.5-15% by weight of the second colorant.
Claim 7
Dependent Claim
34 words
The method as claimed in claim 1 wherein the ink composition further comprises effective amounts of at least one additive selected from the group consisting of a surfactant, an antiseptic and a rust-preventive agent.
Claim 8
Dependent Claim
30 words
The method as claimed in claim 1 wherein the first colorant is a pigment of not less than 2 microns in the maximum frequency particle size in particle size distribution.
Claim 9
Dependent Claim
16 words
The method as claimed in claim 1 wherein the second colorant is a metal powder pigment.
Claim 10
Dependent Claim
117 words
The method according to claim 1 wherein the ink composition comprises 20-80% by weight of the vehicle, not more than 30% by weight of a resin soluble in the vehicle, and said first and second colorants dissolved or dispersed throughout the vehicle, the colorants comprising: (a) 3-60% by weight of the first colorant, said first colorant being a pigment of not less than 0.5 microns in the maximum frequency particle size, and (b) 0.1-20% by weight of the second colorant, said second colorant being a dyestuff soluble in the vehicle or a pigment smaller in particle size than the first pigment and not more than 1 micron in the maximum frequency particle size in particle size distribution.
Claim 11
Dependent Claim
33 words
The method as claimed in claim 9 wherein the first pigment is at least one member selected from the group consisting of a metal powder pigment, an inorganic pigment and an organic pigment.
Claim 12
Dependent Claim
22 words
The method as claimed in claim 9 wherein the vehicle is a mixture of water and at least one water-soluble organic solvent.
Claim 13
Dependent Claim
48 words
The method as claimed in claim 9 wherein the vehicle is at least one member selected from the group consisting of an alicyclic hydrocarbon, an aliphatic hydrocarbon, an aromatic hydrocarbon, an aliphatic ketone, an alicyclic ketone, an aliphatic carboxylic acid alkyl ester, an aliphatic alcohol, and an ethyleneglycolmonoalkylether.
Claim 14
Dependent Claim
39 words
The method as claimed in claim 9 wherein the ink composition comprises: 35-70% by weight of the vehicle, 1-20% by weight of the resin, 10-40% by weight of the first colorant, and 0.5-15% by weight of the second colorant.
Claim 15
Dependent Claim
34 words
The method as claimed in claim 9 wherein the ink composition further comprises effective amounts of at least one additive selected from the group consisting of a surfactant, an antiseptic and a rust-preventive agent.
Claim 16
Dependent Claim
27 words
The method as claimed in claim 9 wherein the first pigment is not less than 2 microns in the maximum frequency particle size in particle size distribution.
Claim 17
Dependent Claim
16 words
The method as claimed in claim 9 wherein the second colorant is a metal powder pigment.
References Cited (Backward Citations)
GB903724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |