Patent US2934569A successfully refreshed from Google Patents.
US2934569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of para-fluorophenol
Assignee: Olin Corp
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Filing: 1957-07-01
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Granted: 1960-04-26
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Expires: 1977-07-01
Abstract
No abstract record available.
Inventors
- 👤 Jr William E Kuehlewind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:24
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/01; C07C37/02; C07C37/055; C07C37/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A METHOD FOR THE PREPARATION OF PARA- FLOUROPHENOL WHICH COMPRISES HEATING AT AT TEMPERATURE WITHIN THE RANGE FROM 200*C. TO 350*C. IN LIQUID PHASE A MIXTURE OF PARA- BROMOFLOROBENZENE AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, CALCIUM HYDROXIDE, SODIUM CARBONATE, SODIUM BICARBONATE , CALCIUM CARBONATE AND CALCIUM BICARBONATE WHILE THE REACTANTS ARE ADMIXED WITH A LIQUID MEDIUM CONSISTING ESSENTIALLY OF WATER IN WEIGHT AMOUNT FROM 2 TO 99 TIMES THE WEIGHT OF SAID MATERIAL AND COBALT NAPHTENATE IN WEIGHT AMOUNT FROM 0. 1 TO 5 PERCENT, BASED UPON THE WEIGHT OF THE PARABROMOFLUROBENZENE WHEREBY A SALT OF PARA-FLUOROPHENAL IS FORMED AND RECOVERING PARA- FLUOROPHENOL FROM SAID SALT, THE MOLAR RATIO OF SAID MATERIAL TO PARA- BROMOFLUOROBENZENE BEING WITHIN THE RANGE FROM0.5 TO 8 WHEN SAID MATERIAL IS SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE AND SODIUM BICARBONATE AND THE MOLAR RATIO OF SAID MATERIAL TO PARA- BROMOFLUOROBENZENE BEING WITHIN THE RANGE FROM 0.25 TO 4 WHEN SAID MATERIAL IS SELECTED FROM THE GROUP CONSISTING OF CALCIUM HYDROXIDE, SODIUM CARNONATE, CALCIUM CARBONATE AND CALCIUM BICARBONATE.
Claim 2
Independent Claim
179 words
A METHOD FOR THE PREPARATION OF PARA- FLOUROPHENOL WHICH COMPRISES HEATING AT AT TEMPERATURE WITHIN THE RANGE FROM 200*C. TO 350*C. IN LIQUID PHASE A MIXTURE OF PARA- BROMOFLOROBENZENE AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, CALCIUM HYDROXIDE, SODIUM CARBONATE, SODIUM BICARBONATE , CALCIUM CARBONATE AND CALCIUM BICARBONATE WHILE THE REACTANTS ARE ADMIXED WITH A LIQUID MEDIUM CONSISTING ESSENTIALLY OF WATER IN WEIGHT AMOUNT FROM 2 TO 99 TIMES THE WEIGHT OF SAID MATERIAL AND COBALT NAPHTENATE IN WEIGHT AMOUNT FROM 0. 1 TO 5 PERCENT, BASED UPON THE WEIGHT OF THE PARABROMOFLUROBENZENE WHEREBY A SALT OF PARA-FLUOROPHENAL IS FORMED AND RECOVERING PARA- FLUOROPHENOL FROM SAID SALT, THE MOLAR RATIO OF SAID MATERIAL TO PARA- BROMOFLUOROBENZENE BEING WITHIN THE RANGE FROM0.5 TO 8 WHEN SAID MATERIAL IS SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE AND SODIUM BICARBONATE AND THE MOLAR RATIO OF SAID MATERIAL TO PARA- BROMOFLUOROBENZENE BEING WITHIN THE RANGE FROM 0.25 TO 4 WHEN SAID MATERIAL IS SELECTED FROM THE GROUP CONSISTING OF CALCIUM HYDROXIDE, SODIUM CARNONATE, CALCIUM CARBONATE AND CALCIUM BICARBONATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |