US4278436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing process
Assignee: Bayer AG
•
Filing: 1979-03-06
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Granted: 1981-07-14
•
Expires: 1999-03-06
Abstract
Abstract Process for dyeing and printing cellulose fibre materials with reactive dyestuffs having a halogen leaving group or sulphonyl leaving group on a heterocyclic radical, characterized in that the process is carried out in the presence of a cyanamide or an unsaturated amide in a weakly acid to neutral medium.
Inventors
- 👤 Werner Marschner
- 👤 Heinz Minwegen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:24
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/58; D06P3/60; D06P3/66; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/6421; D06P1/649; D06P1/6495; D06P3/82; D06P3/8204; D06P3/8223; D06P3/8238; D06P3/8252; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
49 words
Process for dyeing and printing cellulose fibre materials with reactive dyestuffs having a halogen leaving group or sulphonyl leaving group on a heterocyclic radical, characterised in that the process is carried out in the presence of a cyanamide of an unsaturated amide in a weakly acid to neutral medium.
Claim 2
Dependent Claim
49 words
Process for dyeing and printing cellulose fibre materials with reactive dyestuffs having a halogen leaving group or sulphonyl leaving group on a heterocyclic radical, characterised in that the process is carried out in the presence of a cyanamide of an unsaturated amide in a weakly acid to neutral medium.
Claim 3
Dependent Claim
24 words
Process according to claim 1, characterised in that a polyester/cellulose fiber mixed fabric is dyed or printed with mixtures of reactive and disperse dyestuffs.
Claim 4
Dependent Claim
18 words
Process according to claim 1, characterised in that it is carried out in one bath in one stage.
Claim 5
Dependent Claim
17 words
Process according to claim 1, characterised in that it is carried out at pH values of 3-7.
Claim 6
Dependent Claim
24 words
Process according to claim 1, characterised in that 10-60 g of a cyanamide or unsaturated amide/l of padding liquor or printing paste are employed.
Claim 7
Dependent Claim
16 words
Process according to claims 1, 2, 3, 4 or 5, characterised in that dicyandiamide is used.
Claim 8
Dependent Claim
17 words
A process of claim 4 characterized in that it is carried out at a pH about 6.5.
Claim 9
Dependent Claim
29 words
A process of claims 4 or 7 characterized in that it is carried out in the absence of fixing agents, for the reactive dyestuffs, which have an alkaline reaction.
References Cited (Backward Citations)
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US2530261A
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US3363972A
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US3418063A
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US3380799A
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US3535308A
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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) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |