US2459435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substantive triazine azo dyes
Assignee: Novartis AG
•
Filing: 1944-08-28
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Granted: 1949-01-18
•
Expires: 1964-08-28
Abstract
No abstract record available.
Inventors
- 👤 Keller Ernst
- 👤 Zweidler Reinhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:27
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/12; C09B43/136; C09B43/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2221360A
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US2221362A
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CH110663A
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CH110626A
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US2004250A
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US2221361A
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US2270478A
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US2283261A
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US2399066A
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US2368844A
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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) | 1952-01-18 | 1952-07-19 | 1953-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-18 | 1956-07-19 | 1957-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-18 | 1960-07-19 | 1961-01-18 | $7700.00 | Window Closed / Lapsed |