Patent US5511561A successfully refreshed from Google Patents.
Patent US1924774A successfully refreshed from Google Patents.
US1924774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dyestuffs and intermediates
Assignee: Scottish Dyes Ltd
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Filing: 1930-02-06
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Granted: 1933-08-29
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Expires: 1950-02-06
Abstract
No abstract record available.
Inventors
- 👤 Fairweather David Alexan Whyte
- 👤 Thomas John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:22
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/10; C09B29/18; C09B29/20; C09B33/00; C09B33/02
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) | 1936-08-28 | 1937-02-27 | 1937-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-08-28 | 1941-02-27 | 1941-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-08-28 | 1945-02-27 | 1945-08-29 | $7700.00 | Window Closed / Lapsed |