Patent US2850540A successfully refreshed from Google Patents.
US2850540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of glycols from conjugated aliphatic diolefins
Assignee: Millennium Petrochemicals Inc
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Filing: 1955-03-22
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Granted: 1958-09-02
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Expires: 1975-03-22
Abstract
No abstract record available.
Inventors
- 👤 Charles E Frank
- 👤 John F Nobis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:07
CPC Classifications
C; C07; C07F; C07F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OF PREPARING A MIXTURE OF UNSATURATED GLYCOLS IN WHICH THE HYDROXYL GROUPS ARE SEPARATED BY AT LEAST FOUR CARBON ATOMS, WHICH COMPRISES DIMERIZING A CONJUGATED ALIPHATIC DIOLEFIN IN THE PRESENCE OF A FINELY DIVIDED ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM AT A TEMPERATURE BELOW ABOUT 0*C. AND IN THE PRESENCE OF AN ACTIVE ETHER DILUENT AND A POLYCYCLIC AROMATIC HYDROCARBON DIMERIZATION ACTIVATOR, THEREAFTER SUBJECTING THE RESULTING ORGANOMETALLIC DIENE TO OXIDATION BY AN OXIDIZING SUBSTANCE, AND HYDROLYZING THE SALTS OF THE GLYCOLS THUS OBTAINED.
Claim 2
Independent Claim
90 words
THE METHOD OF PREPARING A MIXTURE OF UNSATURATED GLYCOLS IN WHICH THE HYDROXYL GROUPS ARE SEPARATED BY AT LEAST FOUR CARBON ATOMS, WHICH COMPRISES DIMERIZING A CONJUGATED ALIPHATIC DIOLEFIN IN THE PRESENCE OF A FINELY DIVIDED ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM AT A TEMPERATURE BELOW ABOUT 0*C. AND IN THE PRESENCE OF AN ACTIVE ETHER DILUENT AND A POLYCYCLIC AROMATIC HYDROCARBON DIMERIZATION ACTIVATOR, THEREAFTER SUBJECTING THE RESULTING ORGANOMETALLIC DIENE TO OXIDATION BY AN OXIDIZING SUBSTANCE, AND HYDROLYZING THE SALTS OF THE GLYCOLS THUS OBTAINED.
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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |