US2776982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of styrene oxide
Assignee: Dow Chemical Co
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Filing: 1953-03-09
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Granted: 1957-01-08
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Expires: 1973-03-09
Abstract
No abstract record available.
Inventors
- 👤 Melvin F Handley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:56
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/64; C07C29/66; C07D; C07D303/00; C07D303/02; C07D303/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN A PROCESS FOR PREPARING AN ARYLETHYLENE OXIDE FROM A MONOVINYL AROMATIC HYDROCARBON FROM THE GROUP CONSISTING OF STYRENE AND NUCLEARLY ALKYLATED STYRENES OF FROM 8 TO 10 CARBON ATOMS, BY (1) REACTING THE MONOVINYL AROMATIC HYDROCARBON UNDER CONDITIONS OF GOOD MIXING AT A TEMPERATURE BETWEEN 0* C. AND 60* C. WITH AN ACIDIFIED AQUEOUS SOLUTION OF A HYPOCHLORITE OF A METAL FROM THE GROUP CONSISTING OF THE ALKALI AND ALKALINE EARTH METALS IN PROPORTION OF FROM 1 TO 2 CHEMICAL EQUIVALENTS OF THE HYPOCHLORITE PER MOLE OF THE MONOVINYL AROMATIC HYDROCARBON, AND (2) REACTING THE CHLOROHYDRIN OF THE MONOVINYL AROMATIC HYDROCARBON SO PREPARED WITH AN AQUEOUS ALKALI METAL HYROXIDE SOLUTION TO OBTAIN THE CORRESPONDING SRYLETHYLENE OXIDE, THE IMPROVEMENTS WHICH CONSIST OF MAINTAINING THROUGHOUT THE STEP (1) REACTION A PH IN THE RANGE OF FROM 4 T 6; AND SUBJECTING
Claim 2
Dependent Claim
140 words
IN A PROCESS FOR PREPARING AN ARYLETHYLENE OXIDE FROM A MONOVINYL AROMATIC HYDROCARBON FROM THE GROUP CONSISTING OF STYRENE AND NUCLEARLY ALKYLATED STYRENES OF FROM 8 TO 10 CARBON ATOMS, BY (1) REACTING THE MONOVINYL AROMATIC HYDROCARBON UNDER CONDITIONS OF GOOD MIXING AT A TEMPERATURE BETWEEN 0* C. AND 60* C. WITH AN ACIDIFIED AQUEOUS SOLUTION OF A HYPOCHLORITE OF A METAL FROM THE GROUP CONSISTING OF THE ALKALI AND ALKALINE EARTH METALS IN PROPORTION OF FROM 1 TO 2 CHEMICAL EQUIVALENTS OF THE HYPOCHLORITE PER MOLE OF THE MONOVINYL AROMATIC HYDROCARBON, AND (2) REACTING THE CHLOROHYDRIN OF THE MONOVINYL AROMATIC HYDROCARBON SO PREPARED WITH AN AQUEOUS ALKALI METAL HYROXIDE SOLUTION TO OBTAIN THE CORRESPONDING SRYLETHYLENE OXIDE, THE IMPROVEMENTS WHICH CONSIST OF MAINTAINING THROUGHOUT THE STEP (1) REACTION A PH IN THE RANGE OF FROM 4 T 6; AND SUBJECTING
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) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |