Patent US4803080A successfully refreshed from Google Patents.
Patent US3634390A successfully refreshed from Google Patents.
US3634390A
Expired / Lapsed
US
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Water-soluble tetraazo dyestuffs containing a pyrazolone and disulfonaphthal group
Assignee: Hoechst AG
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Filing: 1969-04-08
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Granted: 1972-01-11
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Expires: 1989-04-08
Abstract
Abstract WATER-SOLUBLE POLYAZO-DYESTUFFS OF THE FORMULA 1-((3,6-DI(HO3S-),7-(Y-N=N-),8-(HO-)NAPHTHYL)-N=N-), 2-(HO-),4,6-DI(X-),5-(((3-R1,4-(R-N=N-),5-(HO-) PYRAZOL-1-YL),R2-PHENYL)-N=N-)BENZENE SAID DYESTUFFS BEING EASILY SOLUBLE IN WATER AND BEING SUITABLE FOR THE DYEING OF LEATHER AND FUR SUEDES, THE DYEINGS OBTAINED ON SIAD MATERIALS MOSTLY SHOWING A YELLOWISHBROWN SHADE AND HAVING A GOOD RESISTANCE TO ACIDS, A GOOD LEVELLING AND PENETRATING POWER, AND POSSESSING GOOD PROPERTIES OF FASTNESS TO WATER, WASHING, PERSPIRATION, SOLVENTS AND TO LIGHT.
Inventors
- 👤 Karl Sommer
- 👤 Henning Bode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:27
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/18; C09B33/28
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 |