US2959589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterocyclic magnesium chloridecyclic ether grignard reagents
Assignee: Primerica Inc
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Filing: 1957-11-22
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Granted: 1960-11-08
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Expires: 1977-11-22
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Ramsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:55
CPC Classifications
C; C07; C07F; C07F3/00; C07F3/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
86 words
A SOLUTION OF A COMPLEX OF AN AROMATIC HETEROCYCLIC CHLORIDE AND AT LEAST AN EQUIMOLECULAR AMOUNT OF A CYCLIC ETHER, SAID AROMATIC HETEROCYCLIC CHLORIDE CONTAINING UP TO THREE RINGS AND HAVING A HETERO RING SELECTED FROM THE CLASS CONSISTING OF THE FURAN, THIOPHENE, TERTIARY-N-PYRROLE, PYRIDINE, THIAZOLE, OXAZOLE, TERTIARY-NIMIDAZOLE, PYRIDAZINE, PYRAZINE, PYRIMIDINE AND TRAINZINE RINGS, SAID CYCLIC ETHER HAVING BETWEEN 5 AND 6 WHOLE MEMBERS, INCLUSIVE, IN THE RING WITH AT LEAST ONE HYDROGEN ATOM ATTACHED TO EACH CARBON ATOM IN THE RING, AND HAVING THE FORMULA:
Claim 2
Dependent Claim
86 words
A SOLUTION OF A COMPLEX OF AN AROMATIC HETEROCYCLIC CHLORIDE AND AT LEAST AN EQUIMOLECULAR AMOUNT OF A CYCLIC ETHER, SAID AROMATIC HETEROCYCLIC CHLORIDE CONTAINING UP TO THREE RINGS AND HAVING A HETERO RING SELECTED FROM THE CLASS CONSISTING OF THE FURAN, THIOPHENE, TERTIARY-N-PYRROLE, PYRIDINE, THIAZOLE, OXAZOLE, TERTIARY-NIMIDAZOLE, PYRIDAZINE, PYRAZINE, PYRIMIDINE AND TRAINZINE RINGS, SAID CYCLIC ETHER HAVING BETWEEN 5 AND 6 WHOLE MEMBERS, INCLUSIVE, IN THE RING WITH AT LEAST ONE HYDROGEN ATOM ATTACHED TO EACH CARBON ATOM IN THE RING, AND HAVING THE FORMULA:
Claim 3
Dependent Claim
20 words
THE COMPOSITION OF CLAIM 10 IN WHICH THE CYCLIC ETHER IS TETRAHYDROFURAN AND THE AROMATIC HETEROCYCLIC CHLORIDE IS PYRIMIDYL CHLORIDE.
References Cited (Backward Citations)
US2703325A
Cited
GB779100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |