US2520097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkyl pyridines
Assignee: Shell Development Co
•
Filing: 1947-06-02
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Granted: 1950-08-22
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Expires: 1967-06-02
Abstract
No abstract record available.
Inventors
- 👤 George W Hearne
- 👤 Vernon W Buis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:53
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08; C07D213/09; C07D213/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS FOR PROUCTION OF BETA-PICOLINE WHICH COMPRISES REACTING ACROLEIN WITH AMMONIA IN THE PRESENCE OF A MOLAR EXCESS OF AMMONIA AND A CATALYST CONSISTING ESSENTIALLY OF BORON PHOSPHATE AT A TEMPERATURE OF FROM ABOUT 300*C. TO ABOUT 400*C. WITH A THROUGHPUT RATE OF FROM ABOUT 25 TO ABOUT 75 MOLS OF REACTANTS PER LITER OF CATALYST PER HOUR.
Claim 2
Dependent Claim
59 words
A PROCESS FOR PROUCTION OF BETA-PICOLINE WHICH COMPRISES REACTING ACROLEIN WITH AMMONIA IN THE PRESENCE OF A MOLAR EXCESS OF AMMONIA AND A CATALYST CONSISTING ESSENTIALLY OF BORON PHOSPHATE AT A TEMPERATURE OF FROM ABOUT 300*C. TO ABOUT 400*C. WITH A THROUGHPUT RATE OF FROM ABOUT 25 TO ABOUT 75 MOLS OF REACTANTS PER LITER OF CATALYST PER HOUR.
References Cited (Backward Citations)
GB332623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |