Patent US2370537A successfully refreshed from Google Patents.
US2370537A
Expired / Lapsed
US
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Monoazo dyestuffs
Assignee: Imperial Chemical Industries Ltd
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Filing: 1943-05-27
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Granted: 1945-02-27
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Expires: 1963-05-27
Abstract
No abstract record available.
Inventors
- 👤 Heywood Basil Jason
- 👤 Knight Arthur Howard
- 👤 Lapworth Morvan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:15
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/54; C09B62/58
Claims Analysis
Total Claims: 0
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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) | 1948-02-27 | 1948-08-28 | 1949-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-02-27 | 1952-08-28 | 1953-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-02-27 | 1956-08-28 | 1957-02-27 | $7700.00 | Window Closed / Lapsed |