US2870158A
Expired / Lapsed
US
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Process for the preparation of thiazoles
Assignee: Leuna Werke GmbH
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Filing: 1957-10-10
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Granted: 1959-01-20
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Expires: 1977-10-10
Abstract
No abstract record available.
Inventors
- 👤 Asinger Friedrich
- 👤 Thiel Max
- 👤 Schroder Lothar
- 👤 Reckling Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:35
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/08; C07D277/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
A PROCESS FOR THE PREPARATION OF A THIAZOLE WHICH COMPRISES REACTING A THIAZOLINE HAVING ONE DOUBLE BONDED NITROGEN TO CARBON LINKAGE IN THE RING AND AT LEAST ONE SINGLY BONDED CARBON ATOM WHICH CARRIES AT LEAST ONE HYDROGEN ATOM WITH AN OXIDIZING AGENT, SELECTED FROM THE CLASS CONSISTING OF ALKALI METAL CHROMATES, ALKALI METAL DICHROMATES, ALKALI METAL PERMANGANATES, INORGANIC CUPRIC SALTS, INORGANIC FERRIC SALTS, AND ALKALI METAL FERRICYANIDES, AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 50*-125*C., AND IN A WEAKLY ACID MEDIUM UNTIL SAID OXIDIZING AGENT IS SUBSTANTIALLY REDUCED, AND RECOVERING SAID THIAZOLE BY DISTILLATION.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |