Patent US314626A successfully refreshed from Google Patents.
US1663390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pharmaceutical product
Assignee: FIRM CHEM FAB AUF ACTIEN
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Filing: 1926-06-01
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Granted: 1928-03-20
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Expires: 1946-06-01
Abstract
No abstract record available.
Inventors
- 👤 Schoeller Walter
- 👤 Feldt Adolf
- 👤 Gehrke Max
- 👤 Borgwardt Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:22
CPC Classifications
C; C07; C07C; C07C323/00; C07C323/50; C07C323/51; C07C323/57; C07C323/58; C07C323/59
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) | 1931-03-20 | 1931-09-19 | 1932-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-03-20 | 1935-09-19 | 1936-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-03-20 | 1939-09-19 | 1940-03-20 | $7700.00 | Window Closed / Lapsed |