Patent US2877228A successfully refreshed from Google Patents.
US2877228A
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Production of substituted pyridines
Assignee: Phillips Petroleum Co
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Filing: 1952-10-20
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Granted: 1959-03-10
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Expires: 1972-10-20
Abstract
No abstract record available.
Inventors
- 👤 John E Mahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:59
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08; C07D213/09; C07D213/10; C07D213/12; C07D213/14; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN THE PROCESS FOR PRODUCING PYRIDINE DERIVATIVE BY THE INTERACTION OF A CARBONYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF LOW-BOILING ALDEHYDES AND KETONES WITH AMMONIA, THE IMPROVEMENT COMPRISING EFFECTING THE REACTION IN THE PRESENCE OF A SALT OF AN ORGANIC NITROGENCONTAINING BASE WITH HYDROGEN FLUORIDE AND IN THE PRESENCE OF A WATER SOLUBLE METAL PHOSPHATE GLASS AS A SYNERGIST FOR THE CATALYTIC SALT.
Claim 2
Dependent Claim
64 words
IN THE PROCESS FOR PRODUCING PYRIDINE DERIVATIVE BY THE INTERACTION OF A CARBONYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF LOW-BOILING ALDEHYDES AND KETONES WITH AMMONIA, THE IMPROVEMENT COMPRISING EFFECTING THE REACTION IN THE PRESENCE OF A SALT OF AN ORGANIC NITROGENCONTAINING BASE WITH HYDROGEN FLUORIDE AND IN THE PRESENCE OF A WATER SOLUBLE METAL PHOSPHATE GLASS AS A SYNERGIST FOR THE CATALYTIC SALT.
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) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |