US2252722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino acid amidines and process of preparing same
Assignee: CIBA PHARM PROD Inc
•
Filing: 1939-04-29
•
Granted: 1941-08-19
•
Expires: 1959-04-29
Abstract
No abstract record available.
Inventors
- 👤 Miescher Karl
- 👤 Klarer Willi
- 👤 Urech Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:11
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/18; C07D295/195; C07D215/00; C07D215/02; C07D215/16; C07D215/38; C07D215/40; C07D233/00; C07D233/04; C07D233/20; C07D233/24; C07D401/00; C07D401/02; C07D401/04
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) | 1944-08-18 | 1945-02-17 | 1945-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-08-18 | 1949-02-17 | 1949-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-08-18 | 1953-02-17 | 1953-08-19 | $7700.00 | Window Closed / Lapsed |