US4286989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formulations for ink jet printing
Assignee: IBM Information Products Corp
•
Filing: 1980-09-30
•
Granted: 1981-09-01
•
Expires: 2000-09-30
Abstract
Abstract An ink for use in ink jet printing has as its coloring material a dye having the formula: ##STR1## where R is --OCH 2 CO 2 - , --CH 2 CO 2 - , --PO 3 = or --CH 2 --PO 3 = .
Inventors
- 👤 Leo J. Kadehjian
- 👤 Harbans S. Sachdev
- 👤 Clinton D. Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:10
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/328
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
43 words
An ink for use in ink jet printing comprising an aqueous solution of a coloring material having the formula ##STR4## where R is --OCH 2 CO 2 - ,--CH 2 CO 2 - ,--PO 3 = or --CH 2 --PO 3 = .
Claim 2
Dependent Claim
43 words
An ink for use in ink jet printing comprising an aqueous solution of a coloring material having the formula ##STR4## where R is --OCH 2 CO 2 - ,--CH 2 CO 2 - ,--PO 3 = or --CH 2 --PO 3 = .
Claim 3
Dependent Claim
23 words
An ink formulation as claimed in claim 1 wherein the dye is present in from about 1 to about 10% by weight concentration.
Claim 4
Dependent Claim
19 words
The ink formulation as claimed in claim 1 which also contains a buffer to maintain the pH at 7.
Claim 5
Dependent Claim
17 words
An ink as claimed in claim 1 in which R is --OCH 2 CO 2 - .
Claim 6
Dependent Claim
17 words
An ink as claimed in claim 1 in which R is --CH 2 CO 2 - .
Claim 7
Dependent Claim
15 words
An ink as claimed in claim 1 in which R is --PO 3 = .
Claim 8
Dependent Claim
17 words
An ink as claimed in claim 1 in which R is --CH 2 --PO 3 = .
References Cited (Backward Citations)
US3846141A
Cited
US3945836A
Cited
US3945837A
Cited
US4176361A
Cited
US4159203A
Cited
US4155768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |