Patent US2874161A successfully refreshed from Google Patents.
US2874161A
Expired / Lapsed
US
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Alpha, alpha diaryl piperidino ethanols
Assignee: WM S MERRELL CO
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Filing: 1952-03-07
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Granted: 1959-02-17
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Expires: 1972-03-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Marcus G Van Campen
- 👤 Charles H Tilford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:23
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/08; C07D211/18; C07D211/20; C07D211/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
4 words
COMPOUND OF THE 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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |