US3518247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic monoazo dyes containing an n-methylpyridinium,2- or 4-dimethylene group
Assignee: Sandoz AG
•
Filing: 1965-08-20
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Granted: 1970-06-30
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Expires: 1985-08-20
Abstract
No abstract record available.
Inventors
- 👤 Rudolf Altermatt
- 👤 Roland Entschel
- 👤 Curt Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:19
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/50; C09B23/00; C09B39/00; C09B43/00; C09B43/006; C09B43/11; C09B44/00; C09B44/005; C09B51/00; C09B69/00; C09B69/001; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/919; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US626936A
Cited
US1887289A
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US2099525A
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US2153012A
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US2219280A
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US2234723A
Cited
US2436428A
Cited
US3247207A
Cited
US3192195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |