US2770646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium compounds of basic esters of 2-aryl-2-(1-hydroxycyclohexyl) ethanoic acids
Assignee: Schieffelin and Co
•
Filing: 1951-04-18
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Granted: 1956-11-13
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Expires: 1971-04-18
Abstract
No abstract record available.
Inventors
- 👤 Gino R Treves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:55
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
2 words
THE COMPOUND:
Claim 2
Dependent Claim
2 words
THE COMPOUND:
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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |