US2498431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-and 4-homocyclyl substituted piperidines
Assignee: F Hoffmann La Roche AG
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Filing: 1945-06-13
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Granted: 1950-02-21
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Expires: 1965-06-13
Abstract
No abstract record available.
Inventors
- 👤 Lee John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:45
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/08; C07D211/18; C07D211/20; C07D211/22; C07D211/36; C07D211/40; C07D211/44; C07D211/52; C07D211/68; C07D211/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
PIPERIDINES SELECTED FROM THE GROUP CONSISTING OF THOSE CORRESPONDING TO THE FOLLOWING GENERAL FORMULA AND THEIR ACID ADDITION SALTS
Claim 2
Dependent Claim
19 words
PIPERIDINES SELECTED FROM THE GROUP CONSISTING OF THOSE CORRESPONDING TO THE FOLLOWING GENERAL FORMULA AND THEIR ACID ADDITION SALTS
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) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |