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US4752337A
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Recording liquid for ink jet recording systems
Assignee: Bayer AG
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Filing: 1987-06-05
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Granted: 1988-06-21
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Expires: 2007-06-05
Abstract
Abstract Recording liquid for ink jet recording systems containing dyestuffs of the formulae ##STR1## with the substituent definitions given in the description. They form high-contrast images of high fastness to water, light and abrasion.
Inventors
- 👤 Klaus Kunde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:09
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/328
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
Recording liquid for ink jet recording systems, comprising a dyestuff of the formula in the form of an Li, K or alkanolammonium salt, or a dyestuff of the formula ##STR17## in the form of an alkali metal salt or alkanolammonium salt, wherein R═H, C 1 -C 4 -alkyl which is optionally substituted by OH or amino, optionally substituted C 1 -C 4 -alkylcarbonyl, optionally substituted phenyl or optionally substituted phenylcarbonyl, n=0 or 1 and p and q=0 or 1, and wherein p+q=1.
Claim 2
Dependent Claim
82 words
Recording liquid for ink jet recording systems, comprising a dyestuff of the formula in the form of an Li, K or alkanolammonium salt, or a dyestuff of the formula ##STR17## in the form of an alkali metal salt or alkanolammonium salt, wherein R═H, C 1 -C 4 -alkyl which is optionally substituted by OH or amino, optionally substituted C 1 -C 4 -alkylcarbonyl, optionally substituted phenyl or optionally substituted phenylcarbonyl, n=0 or 1 and p and q=0 or 1, and wherein p+q=1.
Claim 3
Dependent Claim
22 words
Recording liquid according to claim 1, comprising dyestuffs of the formula ##STR18## in the form of their Li, K or alkanolammonium salt.
Claim 4
Dependent Claim
22 words
Recording liquid according to claim 2, comprising dyestuffs of the formula ##STR19## in the form of their alkali metal or alkanolammonium salts.
Claim 5
Dependent Claim
35 words
Recording liquid according to claim 1, comprising dyestuffs where R═H, CH 3 , C 2 H 4 OH, C 2 H 4 NH 2 , phenyl 3-sulphophenyl, acetyl, propionyl, benzoyl, maleinyl, 4-sulphophenyl, 3-carboxyphenyl or 4-carboxyphenyl.
Claim 6
Dependent Claim
102 words
Recording liquid according to claim 1, comprising dyestuffs with the cation ##STR20## wherein R 1 ═H or C 1 -C 4 -alkyl which is optionally substituted by OH or hydroxy-C 1 -C 4 -alkoxy, in particular CH 3 , C 2 H 5 , CH 2 CH 2 OH, CH 2 CHOHCH 3 or C 3 H 6 OC 2 H 4 OH and R 2 =C 1 -C 4 -hydroxyalkyl or C 1 -C 4 -hydroxyalkoxy-C 1 -C 4 -alkyl, in particular CH 2 CH 2 OH, CH 2 CHOHCH 3 or C 3 H 6 OC 2 H 4 OH.
Claim 7
Dependent Claim
13 words
An ink jet recording system containing a recording liquid according to claim 1.
References Cited (Backward Citations)
GB2178439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |