US4024125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dis-azo pigments deriving from bis-diazotized diamino-2-phenyl-benzazolones
Assignee: Hoechst AG
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Filing: 1975-10-29
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Granted: 1977-05-17
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Expires: 1995-10-29
Abstract
Abstract Pigments of the general formula <IMAGE> wherein x is sulfur, oxygen or -NR-, R is hydrogen or alkyl of 1 to 4 carbon atoms, A is <IMAGE> <IMAGE> <IMAGE> Y1, Y2, Z1, Z2, Z3, Z4, Z5, Z6 and Z7 are hydrogen, chlorine, bromine, methyl, ethyl, methoxy or ethoxy. These new disazo pigments can be used in all fields of dyeing where pigments are typically used. They are distinguished by improved fastness properties and tinctorial strength.
Inventors
- 👤 Walter Kunstmann
- 👤 Joachim Ribka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:52
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/34
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
62 words
A compound of the formula ##STR19## wherein X is sulfur, oxygen or --NR--, R is hydrogen or alkyl of 1 to 4 carbon atoms, A is ##STR20## Y 1 , Y 2 , Z 1 , Z 2 , Z 3 , Z 4 , Z 5 , Z 6 and Z 7 are hydrogen, chlorine, bromine, methyl, ethyl, methoxy or ethoxy.
Claim 2
Dependent Claim
62 words
A compound of the formula ##STR19## wherein X is sulfur, oxygen or --NR--, R is hydrogen or alkyl of 1 to 4 carbon atoms, A is ##STR20## Y 1 , Y 2 , Z 1 , Z 2 , Z 3 , Z 4 , Z 5 , Z 6 and Z 7 are hydrogen, chlorine, bromine, methyl, ethyl, methoxy or ethoxy.
Claim 3
Dependent Claim
13 words
A compound as claimed in claim 1, wherein X is sulfur or oxygen.
Claim 4
Dependent Claim
8 words
The compound of claim 1 which is ##STR21##
Claim 5
Dependent Claim
8 words
The compound of claim 1 which is ##STR22##
Claim 6
Dependent Claim
8 words
The compound of claim 1 which is ##STR23##
Claim 7
Dependent Claim
8 words
The compound of claim 1 which is ##STR24##
References Cited (Backward Citations)
US2195011A
Cited
FR854156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |