US4604139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual color ink composition
Assignee: Sakura Color Products Corp
•
Filing: 1982-02-02
•
Granted: 1986-08-05
•
Expires: 2002-02-02
Abstract
Abstract An ink composition 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 composition comprises: 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
2026-11-06 13:41
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/50
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
127 words
An ink composition 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 composition comprises: a first colorant, a second colorant and a vehicle, said first colorant 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 a dyestuff dissolved throughout 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
Dependent Claim
127 words
An ink composition 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 composition comprises: a first colorant, a second colorant and a vehicle, said first colorant 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 a dyestuff dissolved throughout 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
34 words
The ink composition 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
23 words
The ink composition 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
49 words
The ink composition as claimed in claim 1 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 6
Dependent Claim
36 words
The ink composition as claimed in claim 1 which 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
32 words
The ink composition as claimed in claim 1 which 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
28 words
The ink composition as claimed in claim 1 wherein the first colorant is not less than 2 microns in the maximum frequency particle size in particle size distribution.
Claim 9
Dependent Claim
17 words
The ink composition as claimed in claim 1 wherein the first colorant is a metal powder pigment.
Claim 10
Dependent Claim
66 words
The ink composition according to claim 1 which comprises 20-80% by weight of a vehicle, not more than 30% by weight of a resin soluble 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.
Claim 11
Dependent Claim
34 words
The ink composition as claimed in claim 9 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 12
Dependent Claim
23 words
The ink composition 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
49 words
The ink composition 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
36 words
The ink composition as claimed in claim 9 which comprises: 35-70% by weight of the solvent, 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 15
Dependent Claim
32 words
The ink composition as claimed in claim 9 which 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
28 words
The ink composition as claimed in claim 9 wherein the first colorant is not less than 2 microns in the maximum frequency particle size in particle size distribution.
Claim 17
Dependent Claim
17 words
The ink composition as claimed in claim 9 wherein the first colorant is a metal powder pigment.
References Cited (Backward Citations)
US903023A
Cited
GB695548A
Cited
GB903724A
Cited
US3406137A
Cited
US3884707A
Cited
US3928226A
Cited
JPS5327975A
Cited
JPS57111364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |