US2739969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted alkyl piperidines
Assignee: Merck Sharp & Dohme LLC
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Filing: 1952-06-09
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Granted: 1956-03-27
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Expires: 1972-06-09
Abstract
No abstract record available.
Inventors
- 👤 Sperber Nathan
- 👤 Papa Domenick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:07
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/68; C07D211/70; C07D211/06; C07D211/08; C07D211/10; C07D211/14; C07D211/18; C07D211/20; C07D211/22; C07D211/36; C07D211/60; C07D211/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
PIPERIDYLIDENE COMPOUNDS OF THE GROUP CONSISTING OF BASES OF THE GENERAL FORMULA
Claim 2
Dependent Claim
12 words
PIPERIDYLIDENE COMPOUNDS OF THE GROUP CONSISTING OF BASES OF THE GENERAL FORMULA
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) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |