Patent US2586746A successfully refreshed from Google Patents.
Patent US4239544A successfully refreshed from Google Patents.
US4239544A
Expired / Lapsed
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Jet drop printing ink composition
Assignee: Eastman Kodak Co
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Filing: 1979-04-23
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Granted: 1980-12-16
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Expires: 1999-04-23
Abstract
Abstract A nonagglomerating, nonsettling, optical character readable jet drop printing ink of a mixture of C. I. Acid Green 1, C. I. Acid Blue 9, and C. I. Acid Red 73 dyes. The ink composition is infrared absorbent and visually black to the eye.
Inventors
- 👤 Joseph G. Strem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:41
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/328
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
A jet drop printing ink comprising: about 3.8 weight percent of a dye having the chemical formula ##STR4## about 2.2. weight percent of a dye having the chemical formula ##STR5## about 1.0 weight percent of a dye having the chemical formula ##STR6## and balance water, said ink being infrared absorbent at wavelengths utilized by optical character readers and appearing visually black to the human eye.
Claim 2
Dependent Claim
65 words
A jet drop printing ink comprising: about 3.8 weight percent of a dye having the chemical formula ##STR4## about 2.2. weight percent of a dye having the chemical formula ##STR5## about 1.0 weight percent of a dye having the chemical formula ##STR6## and balance water, said ink being infrared absorbent at wavelengths utilized by optical character readers and appearing visually black to the human eye.
Claim 3
Dependent Claim
21 words
The ink of claim 1 where the pH of the ink is adjusted to a range of about 7.3 to 7.7.
Claim 4
Dependent Claim
9 words
The ink of claim 2 further including a humectant.
Claim 5
Dependent Claim
15 words
The ink of claim 3 wherein said humectant comprises about 1.0 weight percent acetylene glycol.
Claim 6
Dependent Claim
9 words
The ink of claim 4 further including a preservative.
Claim 7
Dependent Claim
16 words
The ink of claim 5 wherein said preservative comprises about 1.0 weight percent 6-acetoxy-2,4, di-methyl dioxane.
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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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |