Dyeing process
USRE29724E · kind E · reissue
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4References
10Claims
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Assignee
Inventors
Key dates
| Filing date | Mar 8, 1977 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Mar 8, 1997 |
Classification
- Technology area (CPC —)General
Abstract
Dyeing nylon by applying sulphonated or unsulphonated dyestuffs containing cyclic anhydride groups, anhydride forming dicarboxylic acid groups or half-esters or half-amides thereof, as free acids or as salts with ammonia or volatile amines, and heating the fibre until dyestuff fixation takes place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.