Mixture of quinophthalone dispense dyestuffs
Abstract
Abstract A mixture consisting of two dyestuffs in a ratio of from 10 : 90 and 90 : 10% by weight of the general formula WHEREIN X represents an oxygen atom of a sulfur atom or a sulfonyl group, R represents an aryl group, an aliphatic or a hetero-cyclic group, Y represents a hydrogen atom, a halogen atom, a nitro group or a phenyl group, Z represents a hydrogen or halogen atom, M IS AN INTEGER FROM 1 TO 4 AND N IS THE INTEGER 1 OR 2 AND WHICH DIFFER IN AT LEAST ONE MEANING OF X, R, Y and Z. These dyestuff mixtures dye synthetic fibrous materials, in particular polyethene terephthalate, yellow shades of good fastness to washing, solvents and light as well as to hot processing and to thermofixation. They are especially useful for the dyeing of wound packages.
Inventors
- 👤 E Spietschka
- 👤 F Ische
- 👤 H Kruse
Bibliographic Details
Claims Analysis
Total Claims: 5References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |