US2398418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Introduction of organic radicals into quinones
Assignee: Individual
•
Filing: 1943-08-27
•
Granted: 1946-04-16
•
Expires: 1963-08-27
Abstract
No abstract record available.
Inventors
- 👤 Louis F Fieser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:39
CPC Classifications
C; C07; C07C; C07C66/00; C07C201/00; C07C201/06; C07C201/12; C07C46/00; C07C50/00; C07C50/02; C07C50/10; C07C50/14; C07C50/24; C07C50/26; C07C50/28; C07C50/32
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) | 1949-04-15 | 1949-10-15 | 1950-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-15 | 1953-10-15 | 1954-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-15 | 1957-10-15 | 1958-04-16 | $7700.00 | Window Closed / Lapsed |