Patent US2059852A successfully refreshed from Google Patents.
US2059852A
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Azo dyes and method for their preparation
Assignee: EIDP Inc
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Filing: 1933-08-22
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Granted: 1936-11-03
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Expires: 1953-08-22
Abstract
No abstract record available.
Inventors
- 👤 Dahlen Miles Augustinus
- 👤 Zwilgmeyer Frithjof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:31
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/02; C09B33/153; Y; Y10; Y10S; Y10S534/00; Y10S534/01
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) | 1939-11-03 | 1940-05-04 | 1940-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-11-03 | 1944-05-04 | 1944-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-11-03 | 1948-05-04 | 1948-11-03 | $7700.00 | Window Closed / Lapsed |