US4078884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid preparations of reactive dyestuffs
Assignee: Hoechst AG
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Filing: 1975-11-18
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Granted: 1978-03-14
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Expires: 1995-11-18
Abstract
Abstract Liquid aqueous dyeing preparations of fiber-reactive dyestuffs consisting of A. a total of from 5 to 35 percent by weight of the two dyestuffs corresponding in the form of the free acids to the formulae (I) and (II) ##STR1## b. from 1 to 5 percent by weight of buffer substances not capable of being reacted chemically with the fiber-reactive grouping of the said dyestuffs, and C. from 94 to 60 percent by weight of water, and having a pH-value between 3 and 7, Said dyeing preparations being suitable for the dyeing or printing of wool, silk, fibrous materials consisting of polyamides, native or regenerated cellulose or blends of fibers containing one or more of the said fibrous materials.
Inventors
- 👤 Konrad Opitz
- 👤 Ludwig Schlafer
- 👤 Erwin Ungermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:31
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0072; C09B67/0073; C09B62/00; C09B62/44; C09B62/503; C09B62/507; C09B62/51
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
84 words
Liquid aqueous dyeing preparations of fiber-reactive dyestuffs consisting essentially of a. a total of from 5 to 35 percent by weight of the two dyestuffs corresponding in the form of the free acids to the formulae (I) and (II) ##STR5## b. from 1 to 5 percent by weight of buffer substances not capable of being reacted chemically with the fiber-reactive grouping of the said dyestuffs, and c. from 94 to 60 percent by weight of water, and having a pH-value between 3 and 7.
Claim 2
Dependent Claim
84 words
Liquid aqueous dyeing preparations of fiber-reactive dyestuffs consisting essentially of a. a total of from 5 to 35 percent by weight of the two dyestuffs corresponding in the form of the free acids to the formulae (I) and (II) ##STR5## b. from 1 to 5 percent by weight of buffer substances not capable of being reacted chemically with the fiber-reactive grouping of the said dyestuffs, and c. from 94 to 60 percent by weight of water, and having a pH-value between 3 and 7.
Claim 3
Dependent Claim
43 words
Liquid aqueous dyeing preparation as defined in claim 1 and containing, as a buffer substance, sodium acetate, potassium acetate, sodium oxalate, potassium oxalate, sodium borate, an acid sodium salt of phosphoric acid, an acid potassium salt of phosphoric acid, or a mixture thereof.
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) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |