Patent US3087828A successfully refreshed from Google Patents.
Patent US2139190A successfully refreshed from Google Patents.
US2139190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino-acid derivatives and their manufacture
Assignee: Firm J R Geigy S A
•
Filing: 1936-12-11
•
Granted: 1938-12-06
•
Expires: 1956-12-11
Abstract
No abstract record available.
Inventors
- 👤 Iselin Martin
- 👤 Bindler Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:07
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/14; C07C; C07C237/00
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) | 1941-12-05 | 1942-06-06 | 1942-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-12-05 | 1946-06-06 | 1946-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-12-05 | 1950-06-06 | 1950-12-06 | $7700.00 | Window Closed / Lapsed |