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US4211697A
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Azoanilino-toluene sulfonamidoalkyleneamine cationic dyes for paper
Assignee: Novartis Corp
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Filing: 1979-01-18
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Granted: 1980-07-08
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Expires: 1999-01-18
Abstract
Abstract Cationic azo dyes useful for dyeing paper pulp and characterized by their outstanding affinity for paper pulp, both under waterleaf and sized dyeing conditions, are provided. The dyes have the structural formula: <IMAGE> +TR <IMAGE> wherein R1, R2, R3, Q, X and n are specifically defined.
Inventors
- 👤 Kishor A. Desai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:03
CPC Classifications
C; C09; C09B; C09B44/00; C09B44/02; C09B44/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
76 words
A cationic dye characterized by outstanding affinity for paper pulp, and having the structural formula: ##STR7## wherein R 1 is H or CH 3 ; R 2 is H, lower alkyl, lower alkoxy, chloro or bromo; R 3 is lower alkyl or cyano lower alkyl; Q is N(R 4 ) 3 , where R 4 is lower alkyl, or is ##STR8## n is an integer of 2-4; and X is chloro, bromo, methosulfate, ethosulfate, or methanesulfonate.
Claim 2
Dependent Claim
76 words
A cationic dye characterized by outstanding affinity for paper pulp, and having the structural formula: ##STR7## wherein R 1 is H or CH 3 ; R 2 is H, lower alkyl, lower alkoxy, chloro or bromo; R 3 is lower alkyl or cyano lower alkyl; Q is N(R 4 ) 3 , where R 4 is lower alkyl, or is ##STR8## n is an integer of 2-4; and X is chloro, bromo, methosulfate, ethosulfate, or methanesulfonate.
Claim 3
Dependent Claim
16 words
A cationic azo dye of the formula, ##STR9## where X is as defined in claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-08 | 1984-01-07 | 1984-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-08 | 1988-01-07 | 1988-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-08 | 1992-01-07 | 1992-07-08 | $7700.00 | Window Closed / Lapsed |