Patent US4278436A successfully refreshed from Google Patents.
US4278436A
Expired / Lapsed
US
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Dyeing process
Assignee: Bayer AG
•
Filing: 1979-03-06
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Granted: 1981-07-14
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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 02:51
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)
US2440330A
Cited
US2530261A
Cited
US3363972A
Cited
US3418063A
Cited
US3380799A
Cited
US3535308A
Cited
US4134722A
Cited
US4111648A
Cited
US4073617A
Cited
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 |