US2502114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing mononitrofuran compounds
Assignee: Honeywell International Inc
•
Filing: 1947-11-18
•
Granted: 1950-03-28
•
Expires: 1967-11-18
Abstract
No abstract record available.
Inventors
- 👤 Witte Michael
- 👤 Charles J Lind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:35
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/70; C07D307/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN A PROCESS FOR PREPARING MONONITROFURAN COMPOUNDS, THE STEPS WHICH COMPRISE SUBJECTING A FURAN COMPOUND HAVING A REPLACEABLE HYDROGEN ATOM IN AT LEAST ONE OF THE ALPHA POSITIONS ON THE FURAN RING, DISSOLVED IN AN ACETIC ANHYDRIDE MEDIUM, TO THE ACTION OF A NITRATING AGENT IN THE PRESENCE OF A PHOSPHORUS COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS CHLORIDES, PHOSPHORUS, BROMIDES, PHOSPHORUS OXIDES, PHOSPHORUS OXYCHLORIDE AND PHOSPHORUS OXYBROMIDE AT TEMPERATURES BELOW ABOUT 10*C. AND RECOVERING THE MONONITROFURAN COMPOUND.
Claim 2
Dependent Claim
79 words
IN A PROCESS FOR PREPARING MONONITROFURAN COMPOUNDS, THE STEPS WHICH COMPRISE SUBJECTING A FURAN COMPOUND HAVING A REPLACEABLE HYDROGEN ATOM IN AT LEAST ONE OF THE ALPHA POSITIONS ON THE FURAN RING, DISSOLVED IN AN ACETIC ANHYDRIDE MEDIUM, TO THE ACTION OF A NITRATING AGENT IN THE PRESENCE OF A PHOSPHORUS COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS CHLORIDES, PHOSPHORUS, BROMIDES, PHOSPHORUS OXIDES, PHOSPHORUS OXYCHLORIDE AND PHOSPHORUS OXYBROMIDE AT TEMPERATURES BELOW ABOUT 10*C. AND RECOVERING THE MONONITROFURAN COMPOUND.
References Cited (Backward Citations)
US2057076A
Cited
US2370558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |