US2799713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making trichlorophenols from tetrachlorobenzenes
Assignee: Dow Chemical Co
•
Filing: 1955-01-24
•
Granted: 1957-07-16
•
Expires: 1975-01-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Alexander H Widiger
- 👤 Mike L Aaron
- 👤 Gordon F Dugan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:55
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/01; C07C37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A PROCESS FOR MAKING A TRICHLOROPHENOL BY THE ALKALINE HYDROLYSIS OF A TETRACHLOROBENZENE, THE STEP WHICH CONSISTS IN HYDROLYZING A TETRACHLOROBENZENE BY HEATING A MIXTURE OF ONE GRAM MOLECULAR PROPORTION OF A TETRACHLOROBENZENE,FROM 1.8 TO 4.5 GRAM MOLECULAR EQUIVALENT PROPORTIONS OF AN ALKALI METAL HYDROXIDE AND SUFFICIENT WATER TO FORM AN AQUEOUS 2 TO 10 WEIGHT PERCENT SOLUTION OF THE ALKALI METAL HYDROXIDE, AT REACTION TEMPERATURES BETWEEN 225*C. AND 300*C. UNDER AT LEAST THE AUTOGENOUS PRESSURE OF THE MIXTURE.
Claim 2
Dependent Claim
80 words
IN A PROCESS FOR MAKING A TRICHLOROPHENOL BY THE ALKALINE HYDROLYSIS OF A TETRACHLOROBENZENE, THE STEP WHICH CONSISTS IN HYDROLYZING A TETRACHLOROBENZENE BY HEATING A MIXTURE OF ONE GRAM MOLECULAR PROPORTION OF A TETRACHLOROBENZENE,FROM 1.8 TO 4.5 GRAM MOLECULAR EQUIVALENT PROPORTIONS OF AN ALKALI METAL HYDROXIDE AND SUFFICIENT WATER TO FORM AN AQUEOUS 2 TO 10 WEIGHT PERCENT SOLUTION OF THE ALKALI METAL HYDROXIDE, AT REACTION TEMPERATURES BETWEEN 225*C. AND 300*C. UNDER AT LEAST THE AUTOGENOUS PRESSURE OF THE MIXTURE.
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) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |