US3547980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-carbamoyloxy derivatives of 5-(tertiaryaminopropylidene) - 5h - dibenzo(a,d)cycloheptenes
Assignee: Merck and Co Inc
•
Filing: 1967-06-23
•
Granted: 1970-12-15
•
Expires: 1987-06-23
Abstract
No abstract record available.
Inventors
- 👤 Edward L Engelhardt
- 👤 Mark B Freedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:26
CPC Classifications
C; C07; C07C; C07C65/00; C07C65/21; C07C65/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2716659A
Cited
US3409640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |