US5082496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink, and ink-jet recording method and apparatus employing the ink
Assignee: Canon Inc
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Filing: 1991-02-06
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Granted: 1992-01-21
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Expires: 2011-02-06
Abstract
Abstract An ink including a recording agent and a liquid medium for dissolution or dispersion thereof, the recording agent being a compound represented by the general formula ##STR1## wherein R 1 and R 2 are respectively a radical selected from the group of lower alkyl, lower alkoxy, --NHCOCH 3 , --COOM, and --SO 3 M; R 3 , R 4 , and R 5 are respectively a radical selected from the group of hydrogen, hydroxyl, lower alkyl, lower alkoxy, amino, --SO 3 M, and --COOM; A is ##STR2## R 6 and R 7 are respectively a radical selected from the group of hydrogen, hydroxyl, and lower alkoxy; m is 1 or 2; n is 0 or 1; and M is alkali metal or ammonium.
Inventors
- 👤 Takao Yamamoto
- 👤 Tsuyoshi Eida
- 👤 Mayumi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:00
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/328; C09B; C09B31/00; C09B31/16; C09B31/18; C09B31/20; C09B31/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
An ink comprising a recording agent and a liquid medium for dissolution or dispersion thereof, the recording agent being a compound represented by the general formula ##STR9## wherein R 1 and R 2 are respectively a radical selected from the group of lower alkyl, lower alkoxy, --NHCOCH 3 , --COOM, and --SO 3 M; R 3 , R 4 , and R 5 are respectively a radical selected from the group of hydrogen, hydroxyl, lower alkyl, lower alkoxy, amino, --SO 3 M, and --COOM; A is ##STR10## R 6 and R 7 are respectively a radical selected from the group of hydrogen, hydroxyl, and lower alkoxy; m is 1 or 2; n is 0 or 1; and M is alkali metal or ammonium.
Claim 2
Dependent Claim
123 words
An ink comprising a recording agent and a liquid medium for dissolution or dispersion thereof, the recording agent being a compound represented by the general formula ##STR9## wherein R 1 and R 2 are respectively a radical selected from the group of lower alkyl, lower alkoxy, --NHCOCH 3 , --COOM, and --SO 3 M; R 3 , R 4 , and R 5 are respectively a radical selected from the group of hydrogen, hydroxyl, lower alkyl, lower alkoxy, amino, --SO 3 M, and --COOM; A is ##STR10## R 6 and R 7 are respectively a radical selected from the group of hydrogen, hydroxyl, and lower alkoxy; m is 1 or 2; n is 0 or 1; and M is alkali metal or ammonium.
Claim 3
Dependent Claim
21 words
The ink of claim 1, wherein a pH value of the ink is within the range of from 4 to 10.
Claim 4
Dependent Claim
20 words
The ink of claim 1, wherein the liquid medium comprises a mixed solvent of water and a water-soluble organic solvent.
Claim 5
Dependent Claim
30 words
The ink of claim 3, wherein the water is contained in an amount within the range of from 10 to 97.5% by weight of the total weight of the ink.
Claim 6
Dependent Claim
30 words
The ink of claim 3, wherein the water-soluble organic solvent is contained in an amount within the range of from 2 to 80% of the total weight of the ink.
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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) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |