Patent US4256460A successfully refreshed from Google Patents.
US4256460A
Expired / Lapsed
US
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Process for dyeing and printing cellulose fibres
Assignee: Bayer AG
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Filing: 1979-10-04
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Granted: 1981-03-17
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Expires: 1999-10-04
Abstract
Abstract For dyeing and printing cellulose fibres which have been swollen with water-miscible swelling agents or mixed fibres containing these fibres, the fibres are treated with dyestuffs which are free from sulphonic acid groups and carboxylic acid groups, of the general formula ##STR1## wherein R represents optionally substituted C 1 -C 6 -alkyl, cyclohexyl, C 1 -C 4 -alkoxy, phenyl, benzyl, phenylethyl, phenylpropyl or phenoxy, or chlorine or bromine, n represents 0, 1 or 2, one X represents OH and the other X represents NO 2 , NH 2 or R'-CONH and R' represents optionally substituted C 1 -C 4 -alkyl or phenyl, and the dyestuffs are fixed by heat treatment.
Inventors
- 👤 Gunter Gehrke
- 👤 Werner Kuhnel
- 👤 Robert Kuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:35
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/51; C09B1/514; C09B1/516; D; D06; D06P; D06P3/00; D06P3/58; D06P3/60; D06P3/6033; D06P3/6041; D06P5/00; D06P5/003; D06P5/004; D06P5/006; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
In the dyeing and printing of cellulose fibres alone or admixed with other fibers by swelling said fibres with a water-miscible swelling agent capable of maintaining the fibers in swollen condition after removal of water, boiling above 150° C. and, treating the swollen fibres with a dyestuff, and fixing the dyestuff by heat treatment, the improvement which comprises employing as said dyestuff a compound of the formula ##STR10## wherein R is optionally substituted C 1 -C 6 -alkyl, cyclohexyl, C 1 -C 4 -alkoxy, phenyl, benzyl, phenylethyl, phenylpropyl or phenoxy, or chlorine or bromine, n is 0, 1 or 2, one X is OH and the other X is NO 2 , NH 2 or R'-COHN, and R' is optionally substituted C 1 -C 4 -alkyl or phenyl.
Claim 2
Dependent Claim
128 words
In the dyeing and printing of cellulose fibres alone or admixed with other fibers by swelling said fibres with a water-miscible swelling agent capable of maintaining the fibers in swollen condition after removal of water, boiling above 150° C. and, treating the swollen fibres with a dyestuff, and fixing the dyestuff by heat treatment, the improvement which comprises employing as said dyestuff a compound of the formula ##STR10## wherein R is optionally substituted C 1 -C 6 -alkyl, cyclohexyl, C 1 -C 4 -alkoxy, phenyl, benzyl, phenylethyl, phenylpropyl or phenoxy, or chlorine or bromine, n is 0, 1 or 2, one X is OH and the other X is NO 2 , NH 2 or R'-COHN, and R' is optionally substituted C 1 -C 4 -alkyl or phenyl.
Claim 3
Dependent Claim
17 words
Process according to claim 1, characterized in that one X represents NO 2 or NH 2 .
Claim 4
Dependent Claim
14 words
Process according to claim 1, characterized in that one X represents NO 2 .
Claim 5
Dependent Claim
11 words
Process according to claim 2, characterized in that R represents C1.
References Cited (Backward Citations)
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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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |