Patent US2700231A successfully refreshed from Google Patents.
Patent US2523580A successfully refreshed from Google Patents.
US2523580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkyl pyridines
Assignee: Phillips Petroleum Co
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Filing: 1944-12-11
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Granted: 1950-09-26
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Expires: 1964-12-11
Abstract
No abstract record available.
Inventors
- 👤 John E Mahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:55
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08; C07D213/09; C07D213/10; C07D213/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A PROCESS FOR THE PRODUCTION OF AN ALKYL DERIVATIVE OF PYRIDINE WHICH COMPRISES THE CHEMICAL INTERACTION OF AMMONIA AND A SATURATED ALIPHATIC ALDEHYDE AS THE SOLE REACTIVE CONSTITUENTS OF THE ANHYDROUS REACTANT MIXTURE IN THE PRESENCE OF A CATALYST COMPRISING SILICA GEL PROMOTED WITH FROM 0.1 TO 2.0 WEIGHT PER CENT ALUMINA.
Claim 2
Dependent Claim
52 words
A PROCESS FOR THE PRODUCTION OF AN ALKYL DERIVATIVE OF PYRIDINE WHICH COMPRISES THE CHEMICAL INTERACTION OF AMMONIA AND A SATURATED ALIPHATIC ALDEHYDE AS THE SOLE REACTIVE CONSTITUENTS OF THE ANHYDROUS REACTANT MIXTURE IN THE PRESENCE OF A CATALYST COMPRISING SILICA GEL PROMOTED WITH FROM 0.1 TO 2.0 WEIGHT PER CENT ALUMINA.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |