Patent EP0248551A2 successfully refreshed from Google Patents.
US3704086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of highly concentrated,stable stock solutions containing 1:2 metal complex dyes in a single step reaction
Assignee: Individual
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Filing: 1970-06-01
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Granted: 1972-11-28
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Expires: 1990-06-01
Abstract
Abstract PRODUCTION OF HIGHLY CONCENTRATED STABLE STOCK SOLUTIONS CONTAINING 1:2 METAL COMPLEX DYES IN A SINGLE STEP REACTION COMPRISING CONTACTING THE CORRESPONDING AZO DYES IN OXYGEN CONTAINING WATER-MISCIBLE SOLVENTS WITH A METALLIZING AGENT. THE DYE SOLUTIONS ARE USEFUL FOR DYEING NATURAL OR SYNTHETIC POLYAMIDES.
Inventors
- 👤 Dimiter Bayew
- 👤 Manfred Daeuble
- 👤 Otto Kaufmann
- 👤 Ludsteck Enno
- 👤 Dieter Ludsteck
- 👤 Helmut Pfitzner
- 👤 Heinz-Guenter Witsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:58
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0072; C09B67/0073; D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/14; D06P3/20; D06P3/24; D06P3/245
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |