US3446797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(2-propynyl) nitrogen-containing heterocyclic compounds
Assignee: F Hoffmann La Roche AG
•
Filing: 1966-03-28
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Granted: 1969-05-27
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Expires: 1986-03-28
Abstract
No abstract record available.
Inventors
- 👤 Antonino Focella
- 👤 Albert Israel Rachlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:34
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/263; C07D207/267; C07D207/27; C07D211/00; C07D211/04; C07D211/68; C07D211/72; C07D211/74; C07D211/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3278526A
Cited
US3268397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |