Patent US5091484A successfully refreshed from Google Patents.
Patent US2439969A successfully refreshed from Google Patents.
US2439969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino-dioxacyclopentanes
Assignee: Rhone Poulenc SA
•
Filing: 1946-05-08
•
Granted: 1948-04-20
•
Expires: 1966-05-08
Abstract
No abstract record available.
Inventors
- 👤 Fourneau Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:51
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/14; C07D317/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1824676A
Cited
US2406713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |