Patent US3634389A successfully refreshed from Google Patents.
US3634389A
Expired / Lapsed
US
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Basic monoazo dyes
Assignee: Sandoz AG
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Filing: 1969-01-24
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Granted: 1972-01-11
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Expires: 1989-01-24
Abstract
Abstract BASIC AZO DYES OF THE FORMULA 2-((2-R1,4-((CL-CH(-R2)-CH2-)2-N-)PHENYL)-N=N-),3- R3-CH(-OH)-CH2-),6-(R-O-)BENZOTHIAZOLIUM A(-) WHERE R STANDS FOR AN ALKYL RADICAL, R1 FOR HYDROGEN OR AN ALKYL RADICAL, R2 FOR HYDROGEN OR AN ALKYL RADICAL, R3 FOR HYDROGEN, AN ALKYENYL RADICAL, AN UNSUBSTITUTED ALKYL RADICAL OR AN ALKYL RADICAL SUBSTITUTED BY ARYL OR ALKOXY AND AO FOR AN ANION.
Inventors
- 👤 Roland Eutschel
- 👤 Curt Mueller
- 👤 Basel-Land
- 👤 Hans Siegrist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:45
CPC Classifications
C; C09; C09B; C09B44/00; C09B44/10; C09B44/20; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |