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US2459424A
Expired / Lapsed
US
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Anthrimide carbazole dyestuffs
Assignee: SWISS FIRM OF CIBA Ltd
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Filing: 1943-04-20
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Granted: 1949-01-18
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Expires: 1963-04-20
Abstract
No abstract record available.
Inventors
- 👤 Hauser Hermann
- 👤 Bommer Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:57
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/24; C09B5/26; C09B5/28; C09B1/00; C09B1/16; C09B1/20; C09B1/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |