US3518273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzopyranquinolinol derivatives and process for their production
Assignee: Warner Lambert Co LLC
•
Filing: 1966-08-03
•
Granted: 1970-06-30
•
Expires: 1986-08-03
Abstract
No abstract record available.
Inventors
- 👤 Maximilian Von Strandtmann
- 👤 Marvin P Cohen
- 👤 John Shavel Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:09
CPC Classifications
C; C07; C07D; C07D491/00; C07D491/02; C07D491/04; C07D311/00; C07D311/02; C07D311/78; C07D311/92; C07D493/00; C07D493/02; C07D493/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |