Patent US4153593A successfully refreshed from Google Patents.
US4153593A
Expired / Lapsed
US
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Fluorescent ink composition for jet printing
Assignee: Videojet Technologies Inc
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Filing: 1976-09-17
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Granted: 1979-05-08
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Expires: 1996-09-17
Abstract
Abstract An aqueous jet printing ink composition which fluoresces under ultra violet radiation containing a water soluble fluorescent dye dissolved in the water base in an amount up to 2% by weight and a water soluble binder component dissolved in the water base in an amount to provide for a specific viscosity which does not exceed 20 centipoises and which preferably includes a fluorescent brightener alone or in combination with fluorescein or one of its salts.
Inventors
- 👤 Daniel M. Zabiak
- 👤 Ki-Sup Hwang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:30
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/50; C09D11/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
A fluorescent jet printing ink which is reflective under ultraviolet radiation comprising a water base and the combination of a fluorescent dye component dissolved in the water base in an amount up to 2% by weight and a fluorescent brightener which absorbs at a lower energy level than the fluorescent dye component and has a peak immersion wavelength close to the peak absorption layer of the fluorescent dye component and present in the dissolved state in an amount within the range of 0.05-5% by weight, a humectant present in an amount within the range of 2-30% by weight and a water soluble binder dissolved in the water base in an amount which, when based on the viscosity of the ink composition, does not exceed 20 centipoises and provides for a specific resistivity of less than 1000 ohm-cm and which does not interfere with the fluorescence of the fluorescent dye.
Claim 2
Dependent Claim
149 words
A fluorescent jet printing ink which is reflective under ultraviolet radiation comprising a water base and the combination of a fluorescent dye component dissolved in the water base in an amount up to 2% by weight and a fluorescent brightener which absorbs at a lower energy level than the fluorescent dye component and has a peak immersion wavelength close to the peak absorption layer of the fluorescent dye component and present in the dissolved state in an amount within the range of 0.05-5% by weight, a humectant present in an amount within the range of 2-30% by weight and a water soluble binder dissolved in the water base in an amount which, when based on the viscosity of the ink composition, does not exceed 20 centipoises and provides for a specific resistivity of less than 1000 ohm-cm and which does not interfere with the fluorescence of the fluorescent dye.
Claim 3
Dependent Claim
35 words
A fluorescent printing ink composition as claimed in claim 1 in which the total fluorescent dye components are present in the ink composition in an amount within the range of 0.1% to 2% by weight.
Claim 4
Dependent Claim
36 words
a fluorescent printing ink composition as claimed in claim 1 in which the binder component is present in an amount wherein the viscosity of the ink composition is within the range of 1.5 to 10 centipoises.
Claim 5
Dependent Claim
33 words
A fluorescent printing ink composition as claimed in claim 1 in which the binder component is present in an amount wherein the specific resistivity of the ink composition is less than 500 ohm-cm.
Claim 6
Dependent Claim
22 words
A fluorescent printing ink composition as claimed in claim 1 in which the fluorescent dye is fluorescein or its water soluble salts.
Claim 7
Dependent Claim
18 words
A fluorescent ink composition as claimed in claim 1 in which the binder is a water soluble styrene-acrylate.
Claim 8
Dependent Claim
45 words
A fluorescent ink composition as claimed in claim 1 in which the humectant is selected from the group consisting of alkylene glycol and alkyl ethers of alkylene glycol, in which the alkylene group contains 2-6 carbon atoms and the alkyl group contains 1-6 carbon atoms.
Claim 9
Dependent Claim
25 words
A fluorescent ink composition as claimed in claim 1 in which the ink is filtered so that no particles greater than 5 microns are present.
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) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |