Patent US3419604A successfully refreshed from Google Patents.
US3419604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-amino- or -amino-alkylene-spiro [cyclopropane-1,9'-fluorenes] and the salts thereof
Assignee: Smith Kline & French Laboratories Ltd
•
Filing: 1966-03-07
•
Granted: 1968-12-31
•
Expires: 1986-03-07
Abstract
No abstract record available.
Inventors
- 👤 Kaiser Carl
- 👤 Charles L Zirkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:15
CPC Classifications
C; C07; C07C; C07C245/00; C07C245/12; C07C245/14; C07C49/00; C07C49/587; C07C49/657; C07C49/683; C07C49/687; C07C49/697; C07C49/753; C07C49/755; C07C57/00; C07C57/46; C07C57/50; C07C61/00; C07C61/16; C07C61/39; C07C61/40; C07C2601/00; C07C2601/02; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/18; C07C2603/93; C07C2603/94
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB872943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |