US3026324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of pyridine
Assignee: —
•
Filing: —
•
Granted: 1962-03-20
•
Expires: 1979-03-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:11
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/80; C07D213/81; C07D213/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN THE PROCESS FOR THE MANUFACTURE OF PYRIDINECARBOXYLIC ACID AMIDES BY REACTING A PYRIDINE-CARBOXYLIC ACID WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF AMMONIA, AN AMINE AND AN AMMONIUM SALT, THE STEP WHICH COMPRISES CARRYING OUT THE REACTION IN THE PRESENCE OF AT LEAST ONE EQUIVALENT AMOUNT OF A MEMBER OF THE GROUP CONSISTING OF SULPHAMIC ACID, THE AMMONIUM SALT THEREOF AND THE ALKALI METAL SALT THEREOF.
Claim 2
Dependent Claim
68 words
IN THE PROCESS FOR THE MANUFACTURE OF PYRIDINECARBOXYLIC ACID AMIDES BY REACTING A PYRIDINE-CARBOXYLIC ACID WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF AMMONIA, AN AMINE AND AN AMMONIUM SALT, THE STEP WHICH COMPRISES CARRYING OUT THE REACTION IN THE PRESENCE OF AT LEAST ONE EQUIVALENT AMOUNT OF A MEMBER OF THE GROUP CONSISTING OF SULPHAMIC ACID, THE AMMONIUM SALT THEREOF AND THE ALKALI METAL SALT THEREOF.
References Cited (Backward Citations)
US2419831A
Cited
US2453706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |