US2145579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterocyclic azo derivatives
Assignee: Schering Kahlbaum AG
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Filing: 1935-04-16
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Granted: 1939-01-31
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Expires: 1955-04-16
Abstract
No abstract record available.
Inventors
- 👤 Binz Arthur
- 👤 Schickh Otto Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:52
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3617
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) | 1942-01-30 | 1942-08-01 | 1943-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-30 | 1946-08-01 | 1947-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-30 | 1950-08-01 | 1951-01-31 | $7700.00 | Window Closed / Lapsed |