US2703804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of substituted pyridines
Assignee: Phillips Petroleum Co
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Filing: 1952-10-20
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Granted: 1955-03-08
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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
2026-11-05 22:37
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08; C07D213/09; C07D213/10; C07D213/12; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN A PROCESS FOR PRODUCING PYRIDINE DERIVATIVES BY THE INTERACTION OF A CARBONYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALDEHYDES AND KETONES WITH AMMONIA, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE REACTION IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF THE BIFLUORIDES OF THE METALS OF GROUP IA AND LITHIUM FLUORIDE.
Claim 2
Dependent Claim
55 words
IN A PROCESS FOR PRODUCING PYRIDINE DERIVATIVES BY THE INTERACTION OF A CARBONYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALDEHYDES AND KETONES WITH AMMONIA, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE REACTION IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF THE BIFLUORIDES OF THE METALS OF GROUP IA AND LITHIUM FLUORIDE.
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) | 1958-03-07 | 1958-09-06 | 1959-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-07 | 1962-09-06 | 1963-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-07 | 1966-09-06 | 1967-03-08 | $7700.00 | Window Closed / Lapsed |