US2744904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing pyridine and 3-picoline
Assignee: Individual
•
Filing: 1953-11-25
•
Granted: 1956-05-08
•
Expires: 1973-11-25
Abstract
No abstract record available.
Inventors
- 👤 Francis E Cislak
- 👤 William R Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 23:08
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08; C07D213/09; C07D213/12; B; B01; B01J; B01J27/00; B01J27/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
THE PROCESS OF PREPARING PYRIDINE AND 3-PICOLINE WHICH COMPRISES AN INTERACTION OF ACETYLENE, AMMONIA, AND METHANOL IN THE PRESENCE OF A CATALYST USEFUL IN THE PREPARATION OF PICOLINES FROM ACETYLENE AND AMMONIA.
Claim 2
Dependent Claim
32 words
THE PROCESS OF PREPARING PYRIDINE AND 3-PICOLINE WHICH COMPRISES AN INTERACTION OF ACETYLENE, AMMONIA, AND METHANOL IN THE PRESENCE OF A CATALYST USEFUL IN THE PREPARATION OF PICOLINES FROM ACETYLENE AND AMMONIA.
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) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |