US2677688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing vinyl pyridines
Assignee: EIDP Inc
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Filing: 1951-05-23
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Granted: 1954-05-04
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Expires: 1971-05-23
Abstract
No abstract record available.
Inventors
- 👤 Burrows Lawton Arthur
- 👤 Kalb George Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:20
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE PROCESS FOR THE PREPARATION OF PYRIDINE COMPOUNDS HAVING AT LEAST ONE UNSATURATED SIDE CHAIN CONTAINING ONLY CARBON AND HYDROGEN ATOMS AND IN WHICH TWO CARBON ATOMS ARE JOINED BY A DOUBLE BOND, WHICH PROCESS COMPRISES HEATING IN INTIMATE CONTACT WITH IODINE IN THE VAPOR PHASE AND IN THE TEMPERATURE RANGE OF 450 TO 800* C. A MIXTURE OF OXYGEN AND HETEROCYCLIC COMPOUND CONTAINING A PYRIDINE NUCLEUS HAVING ATTACHED TO NUCLEAR CARBON AS SOLE SUBSTITUENTS ALKYL RADICALS CONTAINING FROM ONE TO TWO CARBON ATOMS AND ALSO HYDROGEN ATOMS BUT NOR OTHER ATOMS, SUCH RADICALS COMPRISING AT LEAST ONE RADICAL OF AT LEAST TWO CARBON ATOMS.
Claim 2
Dependent Claim
105 words
THE PROCESS FOR THE PREPARATION OF PYRIDINE COMPOUNDS HAVING AT LEAST ONE UNSATURATED SIDE CHAIN CONTAINING ONLY CARBON AND HYDROGEN ATOMS AND IN WHICH TWO CARBON ATOMS ARE JOINED BY A DOUBLE BOND, WHICH PROCESS COMPRISES HEATING IN INTIMATE CONTACT WITH IODINE IN THE VAPOR PHASE AND IN THE TEMPERATURE RANGE OF 450 TO 800* C. A MIXTURE OF OXYGEN AND HETEROCYCLIC COMPOUND CONTAINING A PYRIDINE NUCLEUS HAVING ATTACHED TO NUCLEAR CARBON AS SOLE SUBSTITUENTS ALKYL RADICALS CONTAINING FROM ONE TO TWO CARBON ATOMS AND ALSO HYDROGEN ATOMS BUT NOR OTHER ATOMS, SUCH RADICALS COMPRISING AT LEAST ONE RADICAL OF AT LEAST TWO CARBON ATOMS.
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) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |