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US2623871A
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Chromium containing monoazo dyestuffs
Assignee: Novartis AG
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Filing: 1951-03-16
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Granted: 1952-12-30
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Expires: 1971-03-16
Abstract
No abstract record available.
Inventors
- 👤 Schetty Guido
- 👤 Beffa Fabio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:52
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
11 words
THE COMPLEX CHROMIUM COMPOUND OF A MONOAZO DYESTUFF HAVING THE FORMULA:
References Cited (Backward Citations)
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US2482946A
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US2499133A
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US2543610A
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US2551056A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |