US1879541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compounds of the oxazine series
Assignee: Winthrop Chemical Co Inc
•
Filing: 1929-11-15
•
Granted: 1932-09-27
•
Expires: 1949-11-15
Abstract
No abstract record available.
Inventors
- 👤 Schulemann Werner
- 👤 Mietzsch Fritz
- 👤 Wingler August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:25
CPC Classifications
C; C07; C07D; C07D265/00; C07D265/28; C07D265/34; C07D265/38
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1935-09-27 | 1936-03-28 | 1936-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-09-27 | 1940-03-28 | 1940-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-09-27 | 1944-03-28 | 1944-09-27 | $7700.00 | Window Closed / Lapsed |