US5460646A
Expired / Lapsed
US
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Infrared printing ink and method of making same
Assignee: SIA Technology Corp
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Filing: 1994-11-10
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Granted: 1995-10-24
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Expires: 2014-11-10
Abstract
Abstract An infrared printing ink. The printing ink can be read with illumination by a near IR light source and an IR detector. The ink includes a pigment, a vehicle, and a solvent. The infrared ink pigment is silicon (IV) 2,3-naphthalocyanine bis((R 1 )(R 2 )(R 3 )-silyloxide) wherein R 1 , R 2 and R 3 are selected from the group, consisting of an alkyl group, at least one aliphatic cyclic group and at least one aromatic ring. The present inks are produced by mixing the pigment with the solvent to form a colorant solution which is then stirred with the vehicle to form an ink paste.
Inventors
- 👤 Mohamed Lazzouni
- 👤 Mohamed Yousaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:56
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/50
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
58 words
An infrared printing ink, comprising: a colorant; a vehicle; and a solvent, wherein said colorant is silicon (IV) 2,3-naphthalocyanine bis((R 1 )(R 2 )(R 3 )-silyloxide) and R 1 , R 2 , and R 3 are selected from the group consisting of an alkyl group, at least one aliphatic cyclic ring, and at least one aromatic ring.
Claim 2
Dependent Claim
58 words
An infrared printing ink, comprising: a colorant; a vehicle; and a solvent, wherein said colorant is silicon (IV) 2,3-naphthalocyanine bis((R 1 )(R 2 )(R 3 )-silyloxide) and R 1 , R 2 , and R 3 are selected from the group consisting of an alkyl group, at least one aliphatic cyclic ring, and at least one aromatic ring.
Claim 3
Dependent Claim
22 words
The infrared printing ink as claimed in claim 1, wherein R 1 , R 2 , and R 3 are n-alkyl groups.
Claim 4
Dependent Claim
26 words
The infrared printing ink as claimed in claim 2, wherein R 1 , R 2 , and R 3 are n-alkyl groups with 1-12 carbon atoms.
Claim 5
Dependent Claim
21 words
The infrared printing ink as claimed in claim 3, wherein R 1 , R 2 , and R 3 are identical.
Claim 6
Dependent Claim
23 words
The infrared printing ink as claimed in claim 4, wherein R 1 , R 2 , and R 3 are all hexyl groups.
Claim 7
Dependent Claim
22 words
The infrared printing ink as claimed in claim 1 wherein R 1 , R 2 and R 3 are branched alkyl groups.
Claim 8
Dependent Claim
26 words
The infrared printing ink as claimed in claim 6 wherein R 1 , R 2 and R 3 are branched alkyl groups with 1-12 carbon atoms.
Claim 9
Dependent Claim
20 words
The infrared printing ink as claimed in claim 7 wherein R 1 , R 2 and R 3 are identical.
Claim 10
Dependent Claim
22 words
The infrared printing ink as claimed in claim 1, wherein R 1 , R 2 and R 3 are aliphatic cyclic rings.
Claim 11
Dependent Claim
28 words
The infrared printing ink as claimed in claim 9 wherein R 1 , R 2 and R 3 are aliphatic cyclic rings with 5 to 7 carbon atoms.
Claim 12
Dependent Claim
21 words
The infrared printing ink as claimed in claim 1 wherein R 1 , R 2 and R 3 are aromatic rings.
Claim 13
Dependent Claim
35 words
The infrared printing ink as claimed in claim 1 wherein said solvent is selected from the group consisting of hexane, tetrachloroethylene, toluene, trichlorethylene, phenetol, chlorobenzene, cyclohexanol, pyridine, cyclohexanone, methylethylketone, acetone, dimethylformamide, ethanol, and mixtures thereof.
Claim 14
Dependent Claim
14 words
The infrared printing ink as claimed in claim 12 wherein said solvent is cyclohexanone.
Claim 15
Dependent Claim
16 words
The infrared printing ink as claimed in claim 1, wherein said ink further comprises an additive.
Claim 16
Dependent Claim
15 words
The infrared printing ink as claimed in claim 14, wherein said additive is linseed oil.
Claim 17
Dependent Claim
17 words
The infrared printing ink as claimed in claim 1, wherein said ink is an offset lithographic ink.
Claim 18
Independent Claim
78 words
A method of making an infrared printing ink, comprising: mixing a colorant in a solvent to form a colorant solution; and adding said colorant solution to a vehicle to form an ink paste; wherein said colorant is silicon (IV) 2,3-naphthalocyanine bis((R 1 )(R 2 )(R 3 )-silyloxide), and R 1 , R 2 and R 3 are selected from the group consisting of an alkyl group, at least one aliphatic cyclic ring, and at least one aromatic ring.
Claim 19
Independent Claim
78 words
A method of making an infrared printing ink, comprising: mixing a colorant in a solvent to form a colorant solution; and adding said colorant solution to a vehicle to form an ink paste; wherein said colorant is silicon (IV) 2,3-naphthalocyanine bis((R 1 )(R 2 )(R 3 )-silyloxide), and R 1 , R 2 and R 3 are selected from the group consisting of an alkyl group, at least one aliphatic cyclic ring, and at least one aromatic ring.
Claim 20
Dependent Claim
13 words
The method of claim 17, wherein said colorant is silicon (IV) 2,3-naphthalocyanine bis(trihexyl-silyloxide).
Claim 21
Dependent Claim
31 words
The method of claim 17, wherein said solvent is selected from the group consisting of hexane, tetrachloroethylene, toluene, trichlorethylene, phenetol, chlorobenzene, cyclohexanol, pyridine, cyclohexanone, methylethylketone, acetone, dimethylformamide, ethanol, and mixtures thereof.
Claim 22
Dependent Claim
10 words
The method of claim 19, wherein said solvent is cyclohexanone.
Claim 23
Dependent Claim
17 words
The method of claim 17, further comprising the step of mixing an additive in said ink paste.
Claim 24
Dependent Claim
11 words
The method of claim 21, wherein said additive is linseed oil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-10-23 | 1999-04-24 | 1999-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-23 | 2003-04-24 | 2003-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-23 | 2007-04-24 | 2007-10-24 | $7700.00 | Window Closed / Lapsed |