US3755470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyhalo phenols
Assignee: Individual
•
Filing: 1968-07-31
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Granted: 1973-08-28
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Expires: 1988-07-31
Abstract
Abstract A PROCESS IS PROVIDED FOR THE HYDROLYSIS OF POLYHALOBENZENE TO POLYHALO PHENOLS IN GOOD YIELDS AND PURITY BY INITIALLY REACTING ETHYLENE GLYCOL WITH AN ALKALI METAL HYDROXIDE TO OBTAIN A MIXTURE COMPRISING ETHYLENE GLYCOL ALKALI METAL DERIVATIVE, ALKALI METAL HYDROXIDE AND ETHYLENE GLYCOL, ADDING TO THE LATTER MIXTURE AN ALKANE OF FROM 6 TO 14 CARBON ATOMS OR MIXTURES OF THE SAME, SUCH AS MINERAL SPIRITS OR DEODORIZED KEROSENE, THEN INTRODUCING A POLYHALOBENZENE, WHEREBY HYDROLYSIS OF THE LATTER OCCURS AND, THEREAFTER, RECOVERING THE SO-HYDROLYZED BENZENE.
Inventors
- 👤 E Michaels
- 👤 J Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:59
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/24; C07C39/26; C07C39/27; C07C37/00; C07C39/32; C07C41/00; C07C41/01; C07C41/18; C07C41/22
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |