US2507449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-alkyl-4-hydroxypiperidine esters
Assignee: Novartis AG
•
Filing: 1946-06-12
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Granted: 1950-05-09
•
Expires: 1966-06-12
Abstract
No abstract record available.
Inventors
- 👤 Martin Henry
- 👤 Margot Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:08
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/40; C07D211/44; C07D211/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A 1-ALKYL-4-HYDROXPIPERIDINE ESTER OF THE FORMULA WHEREIN AR STANDS FOR A MEMBER SELECTED FROM THE GROUP CONSISTING OF PHENYL AND METHYLPHENYL.
Claim 2
Dependent Claim
21 words
A 1-ALKYL-4-HYDROXPIPERIDINE ESTER OF THE FORMULA WHEREIN AR STANDS FOR A MEMBER SELECTED FROM THE GROUP CONSISTING OF PHENYL AND METHYLPHENYL.
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) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |