US3033866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel 9-acridanemethanol derivatives
Assignee: Smith Kline & French Laboratories Ltd
•
Filing: 1961-06-26
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Granted: 1962-05-08
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Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 Andrew J Saggiomo
- 👤 Weinstock Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:10
CPC Classifications
C; C07; C07D; C07D219/00; C07D219/04; C07D219/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A CHEMICAL INTERMEDIATE HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
7 words
A CHEMICAL INTERMEDIATE HAVING THE FOLLOWING FORMULA:
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) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |