US4295852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dyeing polyamide fibres
Assignee: Bayer AG
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Filing: 1980-11-03
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Granted: 1981-10-20
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Expires: 2000-11-03
Abstract
Abstract Polyamide fibre materials are dyed with acid dyestuffs and/or metal complex dyestuffs in the presence of compounds of the formula ##STR1## in which R represents a C 4 -C 12 -alkyl, C 1 -C 12 -alkoxy, phenyl, cyclohexyl or C 2 -C 10 -hydroxyalkoxy radical, R 1 represents hydrogen or a C 1 -C 4 -alkyl radical, n represents an integer from 1 to 10 and m represents a number from 1 to n+1, or water-soluble salts thereof.
Inventors
- 👤 Klaus Walz
- 👤 Joachim Fiegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:30
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/06; D06P1/00; D06P1/44; D06P1/52; D06P1/56; D06P1/62; D06P1/621; D06P1/622; D06P1/625
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
Process for dyeing polyamide fibre materials with acid dyestuffs and/or metal complex dyestuffs, characterised in that the dyeing is carried out in the presence of compounds of the formula ##STR5## in which R represents a C 4 -C 12 -alkyl, C 1 -C 12 -alkoxy, phenyl, cyclohexyl or C 2 -C 10 -hydroxyalkoxy radical, R 1 represents hydrogen or a C 1 -C 4 -alkyl radical, n represents an integer from 1 to 10 and m represents a number from 1 to n+1, or water-soluble salts thereof.
Claim 2
Dependent Claim
87 words
Process for dyeing polyamide fibre materials with acid dyestuffs and/or metal complex dyestuffs, characterised in that the dyeing is carried out in the presence of compounds of the formula ##STR5## in which R represents a C 4 -C 12 -alkyl, C 1 -C 12 -alkoxy, phenyl, cyclohexyl or C 2 -C 10 -hydroxyalkoxy radical, R 1 represents hydrogen or a C 1 -C 4 -alkyl radical, n represents an integer from 1 to 10 and m represents a number from 1 to n+1, or water-soluble salts thereof.
Claim 3
Dependent Claim
43 words
Process according to claim 1, characterised in that compounds of claim 1 in which R represents a C 4 -C 12 -alkyl radical or the cyclohexyl radical, R 1 represents hydrogen and n and m represent numbers from 2 to 5 are used.
Claim 4
Dependent Claim
20 words
Process according to claim 1, characterised in that fibre materials of synthetic polyamides are dyed with 1:2 metal complex dyestuffs.
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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |