US2063027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing formylamino anthraquinones and products obtainable by said process
Assignee: EIDP Inc
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Filing: 1936-01-18
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Granted: 1936-12-08
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Expires: 1956-01-18
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Buxbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:02
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/40
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) | 1939-12-08 | 1940-06-08 | 1940-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-12-08 | 1944-06-08 | 1944-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-12-08 | 1948-06-08 | 1948-12-08 | $7700.00 | Window Closed / Lapsed |