US2962498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkenylpyridine synthesis
Assignee: Phillips Petroleum Co
•
Filing: 1953-11-16
•
Granted: 1960-11-29
•
Expires: 1973-11-16
Abstract
No abstract record available.
Inventors
- 👤 Donald H White
- 👤 John M Folz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:26
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR PURIFICATION AND DEHYDROGENATION OF ALKKYLPYRIDINES, THE SAID PROCESS COMPRISING HEATING CRUDE ALKYLPYRIDINE UNDER PRESSURE, REDUCING THE SAID PRESSURE AND THEREBY EVAPORATING ONLY A PORTION BUT AT LEAST 90 PERCENT OF THE ALKYLPYRIDINE FROM THE CRUDE FEED, DEHYDROGENATING THE EVAPORATED ALKYLPYRIDINE, STEAM STRIPING THE EVAPORATED MATERIAL, MIXING THE RESULTING ALKYLPYRIDINE-RICH EFFLUENT FROM SAID STEAM STRIPPING WITH THE DEHYDROGENATED PYRIDINE, FRACTIONATING THE RESULTING MIXTURE INTO AN ALKYPYRIDINE RICH FRACTION AND AN ALKENYL PYRIDINE RICH FRACTION AND RECYCLING THE ALKYLPYRIDINE RICH FRACTION TO SAID HEATING STEP.
Claim 2
Dependent Claim
86 words
A PROCESS FOR PURIFICATION AND DEHYDROGENATION OF ALKKYLPYRIDINES, THE SAID PROCESS COMPRISING HEATING CRUDE ALKYLPYRIDINE UNDER PRESSURE, REDUCING THE SAID PRESSURE AND THEREBY EVAPORATING ONLY A PORTION BUT AT LEAST 90 PERCENT OF THE ALKYLPYRIDINE FROM THE CRUDE FEED, DEHYDROGENATING THE EVAPORATED ALKYLPYRIDINE, STEAM STRIPING THE EVAPORATED MATERIAL, MIXING THE RESULTING ALKYLPYRIDINE-RICH EFFLUENT FROM SAID STEAM STRIPPING WITH THE DEHYDROGENATED PYRIDINE, FRACTIONATING THE RESULTING MIXTURE INTO AN ALKYPYRIDINE RICH FRACTION AND AN ALKENYL PYRIDINE RICH FRACTION AND RECYCLING THE ALKYLPYRIDINE RICH FRACTION TO SAID HEATING STEP.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |