Patent US3574183A successfully refreshed from Google Patents.
US3574183A
Expired / Lapsed
US
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Water-insoluble monoazo dyestuffs
Assignee: Bayer AG
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Filing: 1967-02-03
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Granted: 1971-04-06
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Expires: 1987-02-03
Abstract
Abstract AZO DYESTUFFS USEFUL IN DYEING AND PRINTING HYDROPHBIC FIBROUS MATERIALS ARE PROVIDED WHICH CORRESPOND TO THE FORMULA 1-(R-N=N-),2-X,4-(R2-N(-R1)-),5-Y-CYCLOHEXANE WHEREIN R IS A CYCLIC RADICAL; X IS ACYLAMINO; Y IS HYDROGEN, HALOGEN, ALKYL, OR AN ALKOXY RADICAL; R1 IS AN ALIPHATIC ETHER RADICAL TERMINATED BY AN ALKOXY CARBOXY RADICAL; AND R2 IS EITHER AN ALKYL RADICAL OR AN R1 RADICAL.
Inventors
- 👤 Winfried Kruckenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:27
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/0025; C09B29/06; C09B29/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |