US2766248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of alkyl pyridines
Assignee: Phillips Petroleum Co
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Filing: 1953-06-26
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Granted: 1956-10-09
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Expires: 1973-06-26
Abstract
No abstract record available.
Inventors
- 👤 John E Mahan
- 👤 Charles E Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:00
CPC Classifications
C; C07; C07D; C07D323/00; C07D323/04; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08; C07D213/09; C07D213/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A PROCESS FOR THE PREVENTION OF REVERSION OF PARALDEHYDE IN THE DISTILLATION OF A MIXTURE OF ACETALDEHYDE AND PARALDEHYDE WHEREIN THE PARALDEHYDE TENDS TO REVERT TO ACETALDEYDE, WHICH COMPRISES INCORPORATING IN SAID MIXTURE BEFORE DISTILLATION A STABILZING AMOUNT OF A PYRIDINE BASE.
Claim 2
Dependent Claim
42 words
A PROCESS FOR THE PREVENTION OF REVERSION OF PARALDEHYDE IN THE DISTILLATION OF A MIXTURE OF ACETALDEHYDE AND PARALDEHYDE WHEREIN THE PARALDEHYDE TENDS TO REVERT TO ACETALDEYDE, WHICH COMPRISES INCORPORATING IN SAID MIXTURE BEFORE DISTILLATION A STABILZING AMOUNT OF A PYRIDINE BASE.
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) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |