US1572768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pharmaceutical product
Assignee: Winthrop Chemical Co Inc
•
Filing: 1925-06-26
•
Granted: 1926-02-09
•
Expires: 1945-06-26
Abstract
No abstract record available.
Inventors
- 👤 Callsen Jurgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:55
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/20; C07D215/22; C07D215/227; C07D215/233
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) | 1929-02-08 | 1929-08-10 | 1930-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-02-08 | 1933-08-10 | 1934-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-02-08 | 1937-08-10 | 1938-02-09 | $7700.00 | Window Closed / Lapsed |