Patent US2773066A successfully refreshed from Google Patents.
US2773066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing poly-pyridyls
Assignee: Research Corp
•
Filing: 1953-11-19
•
Granted: 1956-12-04
•
Expires: 1973-11-19
Abstract
No abstract record available.
Inventors
- 👤 Robert H Linnell
- 👤 Antoine B Zahlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:48
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN MAKING POLYPYRIDYLS, THE PROCESS WHICH COMPRISES BRINGING SODIUM METAL INTO CONTACT WITH A DRY PYRIDINE IN WHICH A 2 POSITION IS UNSUBSTITUTED, SELECTED FROM THE GROUP CONSISTING OF PYRIDINE AND C1-C4 ALKYL SUBSTITUTED PYRIDINES, MAINTAINING THE PROPORTION OF SODIUM METAL IN UNREACTED CONDITION IN CONTACT WITH THE SELECTED PYRIDINE UNDER REACTION CONDITIONS AT ALL TIMES AT A LEVEL NOT ABOVE ABOUT 0.01 MOLE FOR 1 MOLE OF THE SELECTED PYRIDINE, WARMING THE SODIUM AND SELECTED PYRIDINE UNTIL REACTION BETWEEN THEM IS SUBSTANTIALLY COMPLETE, OXIDIZING THE THUS REACTED MIXTURE, THIS OXIDATION PRODUCING POLYPYRIDYLS AND SODIUM HYDROXIDE AND LEAVING AN UNREACTED PYRIDINE, AND THEN SEPARATING THE POLYPYRIDYLS FROM THE SAID PYRIDINE AND SODIUM HYDROXIDE.
Claim 2
Dependent Claim
113 words
IN MAKING POLYPYRIDYLS, THE PROCESS WHICH COMPRISES BRINGING SODIUM METAL INTO CONTACT WITH A DRY PYRIDINE IN WHICH A 2 POSITION IS UNSUBSTITUTED, SELECTED FROM THE GROUP CONSISTING OF PYRIDINE AND C1-C4 ALKYL SUBSTITUTED PYRIDINES, MAINTAINING THE PROPORTION OF SODIUM METAL IN UNREACTED CONDITION IN CONTACT WITH THE SELECTED PYRIDINE UNDER REACTION CONDITIONS AT ALL TIMES AT A LEVEL NOT ABOVE ABOUT 0.01 MOLE FOR 1 MOLE OF THE SELECTED PYRIDINE, WARMING THE SODIUM AND SELECTED PYRIDINE UNTIL REACTION BETWEEN THEM IS SUBSTANTIALLY COMPLETE, OXIDIZING THE THUS REACTED MIXTURE, THIS OXIDATION PRODUCING POLYPYRIDYLS AND SODIUM HYDROXIDE AND LEAVING AN UNREACTED PYRIDINE, AND THEN SEPARATING THE POLYPYRIDYLS FROM THE SAID PYRIDINE AND SODIUM HYDROXIDE.
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) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |