US3652601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone dyes
Assignee: Sandoz AG
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Filing: 1968-02-12
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Granted: 1972-03-28
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Expires: 1988-02-12
Abstract
Abstract ANTHRAQUINONE DYES OF THE FORMULA 1-(HO-),4-W,((+)K-M-PHENYL(B))ANTHRAQUINONE A(-) RING WITH C''S-5,6,7,8 IS D RING WHEREIN M STANDS FOR A DIVALENT RADICAL, W FOR THE NITRO GROUP OR FOR AN AMINO GROUP, KOE.G. FOR AN AMMONIUM-, HYDRAZINIUM-OR AN AMMINO GROUP, AO FOR AN AMION AND WHEREIN THE RING B AND/OR D MAY BE FURTHER SUBSTITUTED. THEY CAN BE USED FOR THE DYEING OF ACRYLONITRILE POLYMERS OR COPOLYMERS.
Inventors
- 👤 Berthold Gertisser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:50
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/501; C09B1/51
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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |