US2831862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethers of n-alkyl-3-hydroxypiperidine and salts thereof
Assignee: LAKESIDE LAB Inc
•
Filing: 1956-02-27
•
Granted: 1958-04-22
•
Expires: 1976-02-27
Abstract
No abstract record available.
Inventors
- 👤 John H Biel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:21
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/40; C07D211/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A MEMBER OF THE GROUP CONSISTING OF COMPOUNDS HAVING THE FORMULA
Claim 2
Dependent Claim
11 words
A MEMBER OF THE GROUP CONSISTING OF COMPOUNDS HAVING THE FORMULA
References Cited (Backward Citations)
US2479843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |