Patent US3883502A successfully refreshed from Google Patents.
US3883502A
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Disazo dyestuffs comprising phenyl methane sulfonic acid diazo component coupled to phenyl or naphthyl anine which is diazotized and couples to an indole coupler
Assignee: Bayer AG
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Filing: 1972-04-10
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Granted: 1975-05-13
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Expires: 1992-04-10
Abstract
Abstract Disazo dyestuffs are disclosed which, in the free acid form, have the formula D R A W I N G IN WHICH R1 is H, Cl, Br, alkyl, alkoxy or nitro; R2 and R3 are H, Cl, Br, alkoxy or alkyl; R4 is alkyl or optionally substituted aryl; R5 is H or alkyl which may be substituted by CN, carboxamide or carboxyl; R6 is a substituent, such as alkyl, alkoxy, halogen, nitro, sulpho, or cyano; B is 1,4-phenylene or 1,4-naphthylene; M IS 1 OR 2; AND N IS 0, 1 OR 2. The dyestuffs are useful in the printing and dyeing of natural and synthetic fiber materials containing amide groups to give dyeings having good fastness properties especially wet processing and light fastness.
Inventors
- 👤 Richard Sommer
- 👤 Edgar Siegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:58
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/04; C09B31/06; C09B31/061; C09B31/12; C09B31/14; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
13 words
DISAZO DYESTUFF WHICH IN THE FORM OF THE FREE ACID, HAS THE FORMULA
Claim 2
Dependent Claim
13 words
DISAZO DYESTUFF WHICH IN THE FORM OF THE FREE ACID, HAS THE FORMULA
Claim 3
Dependent Claim
8 words
The disazo dyestuff of claim 1 in which
Claim 4
Dependent Claim
8 words
The disazo dyestuff of claim 1 in which
Claim 5
Dependent Claim
8 words
The disazo dyestuff of claim 1 in which
Claim 6
Dependent Claim
39 words
The disazo dyestuff of claim 4 in which R1 is hydrogen, chlorine, bromine, methoxy or ethoxy; R4 is methyl or phenyl; R5 is C1-C4-alkyl; or C1-C4-alkyl substituted by cyano, carbonamido or carboxyl; m is 1; and n is 0.
Claim 7
Dependent Claim
51 words
Disazo dyestuff of claim 1 in which R1 is hydrogen, chlorine, bromine, methoxy or ethoxy; R2 is hydrogen, chlorine, methyl, ethyl, methoxy or ethoxy; R3 is hydrogen, methoxy, ethoxy, methyl or ethyl; R4 is C1-C4-alkyl or phenyl; R5 is hydrogen; C1-C4-alkyl or C1-C4-alkyl or C1-C4-alkyl substituted by cyano, carbonamido or carboxyl.
Claim 8
Dependent Claim
10 words
Disazo dyestuff of claim 6 in which n is 0.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |