Patent US3303197A successfully refreshed from Google Patents.
US3303197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fluorinating pentachloropytridine
Assignee: Individual
•
Filing: 1964-11-02
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Granted: 1967-02-07
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Expires: 1984-11-02
Abstract
No abstract record available.
Inventors
- 👤 Haszeldine Robert Neville
- 👤 Banks Ronald Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:23
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR PREPARING FLUORO DERIVATIVES OF PENTACHLOROPYRIDINE WHICH COMPRISES REACTING PENTACHLOROPYRIDINE WITH ANHYDROUS POTASSIUM FLUORIDE IN THE ABSENCE OF A SOLVENT IN A CLOSED VESSEL AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 300* C. TO ABOUT 550* C. AT AN AUTOGENOUS PRESSURE AND RECOVERING AS THE PRODUCTS A MAJOR PROPORTION OF PENTAFLUOROPYRIDINE AND MINOR PROPORTIONS OF 3-CHLOROTETRAFLUOROPYRIDINE AND 3, 5-DICHLOROTRIFLUOROPYRIDINE.
Claim 2
Dependent Claim
63 words
A PROCESS FOR PREPARING FLUORO DERIVATIVES OF PENTACHLOROPYRIDINE WHICH COMPRISES REACTING PENTACHLOROPYRIDINE WITH ANHYDROUS POTASSIUM FLUORIDE IN THE ABSENCE OF A SOLVENT IN A CLOSED VESSEL AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 300* C. TO ABOUT 550* C. AT AN AUTOGENOUS PRESSURE AND RECOVERING AS THE PRODUCTS A MAJOR PROPORTION OF PENTAFLUOROPYRIDINE AND MINOR PROPORTIONS OF 3-CHLOROTETRAFLUOROPYRIDINE AND 3, 5-DICHLOROTRIFLUOROPYRIDINE.
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |