US3342828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing
Assignee: —
•
Filing: —
•
Granted: 1967-09-19
•
Expires: 1984-09-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:34
CPC Classifications
C; C07; C07D; C07D453/00; C07D453/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
68 words
A METHOD OF PRODUCING QUINUCLIDONE-3, WHEREIN 1CARBALKXYMETHYL-4-CARBALKOXYPIPERIDINE IS CYCLIZED IN THE PRESENCE OF A POTASSIUM BUTYLATE SUSPENSION IN A XYLENE MEDIUM ACCOMPANIED BY THE AZETROPIC DISTILLATION OF THE REACTION ALCOHOL BY MEANS OF A FRACTIONATING COLUMN, THE RESULTING POTASSIUM SALT OF THE ENOLIC FORM OF 2-CARBALKOZYQUINUCLIDONE-3 BEING TRANSFORMED THROUGH THE ACTION OF HYDROCHLORIC ACID INTO A HYDROCHLORIC ACID SOLUTION OF QUINUCLIDONE-3 HYDROCHLORIDE AND THEN TREATED BY CAUSTIC ALKALI.
Claim 2
Independent Claim
68 words
A METHOD OF PRODUCING QUINUCLIDONE-3, WHEREIN 1CARBALKXYMETHYL-4-CARBALKOXYPIPERIDINE IS CYCLIZED IN THE PRESENCE OF A POTASSIUM BUTYLATE SUSPENSION IN A XYLENE MEDIUM ACCOMPANIED BY THE AZETROPIC DISTILLATION OF THE REACTION ALCOHOL BY MEANS OF A FRACTIONATING COLUMN, THE RESULTING POTASSIUM SALT OF THE ENOLIC FORM OF 2-CARBALKOZYQUINUCLIDONE-3 BEING TRANSFORMED THROUGH THE ACTION OF HYDROCHLORIC ACID INTO A HYDROCHLORIC ACID SOLUTION OF QUINUCLIDONE-3 HYDROCHLORIDE AND THEN TREATED BY CAUSTIC ALKALI.
Claim 3
Dependent Claim
44 words
A METHOD OF PRODUCING QUINUCLIDONE-3 AS CLAIMED IN CLAIM 1, WHEREIN SAID POTASSIUM BUTYLATE SUSPENSION IS OBTAINED THROUGH THE INTERACTION OF CAUSTIC POTASH AND BUTYL ALCOHOL IN A XYLENE MEDIUM, ACCOMPANIED BY THE AZEOTROPIC REMOVAL FIRST OF THE WATER AND THEN OF THE BUTANOL.
References Cited (Backward Citations)
CA540916A
Cited
SU134265A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |