US2742474A
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: 1956-04-17
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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
2026-11-04 19:31
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
52 words
IN A PROCESS FOR PRODUCTING 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 SULFUR MONOFLUORIDE, SULFUR TETRAFLUORIDE, SULFURYL FLUORIDE, SULFUR HEXAFLUORIDE,
Claim 2
Dependent Claim
52 words
IN A PROCESS FOR PRODUCTING 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 SULFUR MONOFLUORIDE, SULFUR TETRAFLUORIDE, SULFURYL FLUORIDE, SULFUR HEXAFLUORIDE,
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) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |