US2696503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of benzoyl fluoride from monochloro- or monobromobenzene and sodium fluoride
Assignee: EIDP Inc
•
Filing: 1951-05-29
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Granted: 1954-12-07
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Expires: 1971-05-29
Abstract
No abstract record available.
Inventors
- 👤 William W Prichard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:43
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/58
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
PROCESS OF PREPARING BENZOYL FLUORIDE WHICH COMPRISES REACTING UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AT A TEMPERATURE OF 275* C. -450* C. AND A PRESSURE OF 200 TO 650 ATMOSPHERES AN AROMATIC COMPOUND FROM THE GROUP CONSISTING OF MONBROMOBENZENE AND MONOCHLOROBENZENE, IN AN ATMOSPHERE OF CARBON MONOXIDE WITH 0.5 TO 2.5 MOLES OF PREFORMED NICKEL CARBONYL PER EQUIVALENT OF C-HALOGEN GROUP OF SAID AROMATIC COMPOUND AND 1 TO 2.5 STOICHIOMETRIC EQUIVALENTS, PER C-HALOGEN GROUP OF SAID AROMATIC COMPOUND, OF SODIUM FLUORIDE.
References Cited (Backward Citations)
US2556271A
Cited
US2570793A
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US2580070A
Cited
US2517898A
Cited
US2565461A
Cited
US2565462A
Cited
US2565464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |