US3592807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble (n-cyanoloweralkyl-n-acyloxyloweralkylamino)-phenylazo-benzene dyestuffs
Assignee: Cassella Farbwerke Mainkur AG
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Filing: 1965-12-14
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Granted: 1971-07-13
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Expires: 1985-12-14
Abstract
Abstract THIS INVENTION RELATES TO WATER-INSOLUBLE MONOAZO DYESTUFFS HAVING A DIAZO COUPLED N-CYANO-LOWER-ALKYL, N-ACYLOXY-LOWER-ALKYL ANILINE STRUCTURE, WHICH DYESTUFFS DYE OR PRINT NATURAL AND SYNTHETIC FIBERS WITH GOOD FASTNESS PROPERTIES.
Inventors
- 👤 Hanswilli Von Brachel
- 👤 Dieter Cornelius
- 👤 Otto Grawinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:18
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/18; C09B43/20; C09B43/202; C09B43/22; E; E04; E04F; E04F13/00; E04F13/002
Claims Analysis
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |