US3064058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing fluorinated compounds
Assignee: Nepera Chemical Co Inc
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Filing: 1961-04-07
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Granted: 1962-11-13
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Expires: 1981-04-07
Abstract
No abstract record available.
Inventors
- 👤 Bernard F Duesel
- 👤 Richard G Kadesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:25
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/61; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/208; C07C201/00; C07C201/06; C07C201/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A PROCESS OF REPLACING AN ACTIVATED CHLORINE ATOM BY FLUORINE IN CHLORINATED DERIVATIVES OF RING SYSTEMS SELECTED FROM THE GROUP CONSISTING OF BENZENE, NAPHTHALENE AND PYRIDINE BY HEATING A MIXTURE OF SAID CHLORINATED DERIVATIVE AND AN ALKALI METAL FLUORIDE IN THE PRESENCE OF TETRAMETHYLENE SULFONE, THE INPROVEMENT WHICH COMPRISES SUSPENDING THE ALKALI METAL FLUORIDE IN SAID TETRAMETHYLENE SULFONE AND DISTILLING SAID SUSPENSION UNTIL ABOUT 5 TO ABOUT 15 PERCENT BY WEIGHT OF SAID TETRAMETHYLENE SULFONE TOGETHER WITH THE WATER PRESENT HAS BEEN REMOVED BEFORE THE ADDITION OF SAID CHLORINATE DERIVATIVE.
Claim 2
Dependent Claim
91 words
IN A PROCESS OF REPLACING AN ACTIVATED CHLORINE ATOM BY FLUORINE IN CHLORINATED DERIVATIVES OF RING SYSTEMS SELECTED FROM THE GROUP CONSISTING OF BENZENE, NAPHTHALENE AND PYRIDINE BY HEATING A MIXTURE OF SAID CHLORINATED DERIVATIVE AND AN ALKALI METAL FLUORIDE IN THE PRESENCE OF TETRAMETHYLENE SULFONE, THE INPROVEMENT WHICH COMPRISES SUSPENDING THE ALKALI METAL FLUORIDE IN SAID TETRAMETHYLENE SULFONE AND DISTILLING SAID SUSPENSION UNTIL ABOUT 5 TO ABOUT 15 PERCENT BY WEIGHT OF SAID TETRAMETHYLENE SULFONE TOGETHER WITH THE WATER PRESENT HAS BEEN REMOVED BEFORE THE ADDITION OF SAID CHLORINATE DERIVATIVE.
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) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |