Patent US2527970A successfully refreshed from Google Patents.
US2527970A
Expired / Lapsed
US
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Hydroxy ethers and process for
Assignee: —
•
Filing: —
•
Granted: 1950-10-31
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Expires: 1967-10-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:51
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2654; C08G65/2657; C07; C07C; C07C41/00; C07C41/01; C07C41/02; C07C41/03; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/10; C07C43/11; C07C43/13; C07C43/135; C07C69/00; C07C69/02; C07C69/22; C07C69/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR THE PRODUCTION OF A HYDROXY ETHER BY THE CONDENSATION OF ETHYLENE OXIDE AND PENTAEYTHRITOL, WHICH HYDROXY ETHER IS THE COMPOUND RESULTING FROMT HE CONDENSATION OF AT LEAST EIGHT AND NOT MORE THAN SIXTEEN MOLECULAR PROPORTION OF PENTAERYTHRITOL, WHICH COMPRISES HEATING PENTAEYTHRITOL WITH A STOICHIOMETRICAL EXCESS OF ETHYLENE OXIDE REACTIVE TO FORM SAID COMPOUND AT A SUPERATMOSPHERIC PRESSURE UNDER ESSENTIALLY ANHYDROUS REACTION CONDITIONS IN THE PRESENCE OF A STRONGLY ALKALINE CATALYST SELECTED FROMT HE GROUP CONSISTING OF ALKALI METALS AND ALKALI-METAL OXIDES AND HYDROXIDES, AND IN THE PRESENCE OF AN INERT COMMON SOLVENT FOR ETHYLENE OXIDE AND SAID COMPOUND BUT IN WHICH PENTAERYTHRITOL IS SUBSTANTIALLY INSOLUBLE.
Claim 2
Dependent Claim
108 words
A PROCESS FOR THE PRODUCTION OF A HYDROXY ETHER BY THE CONDENSATION OF ETHYLENE OXIDE AND PENTAEYTHRITOL, WHICH HYDROXY ETHER IS THE COMPOUND RESULTING FROMT HE CONDENSATION OF AT LEAST EIGHT AND NOT MORE THAN SIXTEEN MOLECULAR PROPORTION OF PENTAERYTHRITOL, WHICH COMPRISES HEATING PENTAEYTHRITOL WITH A STOICHIOMETRICAL EXCESS OF ETHYLENE OXIDE REACTIVE TO FORM SAID COMPOUND AT A SUPERATMOSPHERIC PRESSURE UNDER ESSENTIALLY ANHYDROUS REACTION CONDITIONS IN THE PRESENCE OF A STRONGLY ALKALINE CATALYST SELECTED FROMT HE GROUP CONSISTING OF ALKALI METALS AND ALKALI-METAL OXIDES AND HYDROXIDES, AND IN THE PRESENCE OF AN INERT COMMON SOLVENT FOR ETHYLENE OXIDE AND SAID COMPOUND BUT IN WHICH PENTAERYTHRITOL IS SUBSTANTIALLY INSOLUBLE.
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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) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |