US2556845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of vinyl pyridine compounds
Assignee: Honeywell International Inc
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Filing: 1947-08-21
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Granted: 1951-06-12
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Expires: 1967-08-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry F Kauffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:20
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
THE PROCESS FOR PRODUCING 2-VINYL, 5-ETHYL PYRIDINE FROM A CRUDE REACTION MIXTURE OF THE CONDENSATION OF FORMALDEHYDE WITH 2-METHYL, 5ETHYL PYRIDINE, SAID MIXTURE COMPRISING THE MONOMETHYLOL AND POLYMETHYLOL DERIVATIVES OF SAID 2-METHYL, 5-ETHYL PYRIDINE FORMED BY SAID CONDENSATION, WHICH COMPRISES REMOVING WATER AND UNREACTED 2-METHYL, 5-ETHYL PYRIDINE FROM SAID MIXTURE BY DISTILLATION, ADDING A STRONG ALKALINE AGENT TO SAID REACTION MIXTURE, AND HEATING THE REMAINING MIXTURE OF REACTION PRODUCTS STILL CONTAINING SAID POLYMETHYLOL DERIVATIVE IN THE PRESENCE OF NOT LESS THAN ABOUT 4% BY WEIGHT OF SAID STRONG ALKALINE AGENT AT TEMPERATURES AT WHICH WATER AND FORMALDEHYDE ARE SPLIT OFF FROM SAID POLYMETHYLOL DERIVATIVE TO FORM SAID 2-VINYL, 5-ETHYL PYRIDINE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |