US2683750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of vinyl ethers
Assignee: —
•
Filing: —
•
Granted: 1954-07-13
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Expires: 1971-07-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:23
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/34; C07C41/40; C07C41/42; C07C29/00; C07C29/74; C07C29/88; C07C31/00; C07C31/02; C07C31/10; C07C41/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR REDUCING THE ALCOHOL CONTENT OF A MIXTURE OF A VINYL EHTER OF THE C4-C8 RANGE WITH ITS CORRESPONDING ALCOHOL, OBTAINED IN THE PREPARATION OF THE VINYL ETHERE BY VINYLATION OF THE ALCOHOL, SAID PROCESS COMPRISING TREATING THE MIXTURE WITH AN AQUEOUS SOLUTION OF A SUBSTANCE CHOSEN FROM THE GROUP CONSISTING OF THE SALTS OF ALKALI METALS AND ALKALINE EARTH METALS WITH ACIDS OF THE FORMULA CNH2NO2 WHERE N IS 3-8, WITH BENZOIC ACID AND WITH AROMATIC ACIDS OF THE FORMULA C8H8O2, SAID AQUEOUS SOLUTION CONTAINING AT LEAST 20% OF THE SALT, WHEREBY A SOLUTION OF THE ALCOHOL IN THE AQUEOUS SOLUTION IS OBTAINED AND THEREAFTER SEPARATING SAID ALCOHOL SOLUTION FROM THE VINYL ETHER.
Claim 2
Dependent Claim
116 words
A PROCESS FOR REDUCING THE ALCOHOL CONTENT OF A MIXTURE OF A VINYL EHTER OF THE C4-C8 RANGE WITH ITS CORRESPONDING ALCOHOL, OBTAINED IN THE PREPARATION OF THE VINYL ETHERE BY VINYLATION OF THE ALCOHOL, SAID PROCESS COMPRISING TREATING THE MIXTURE WITH AN AQUEOUS SOLUTION OF A SUBSTANCE CHOSEN FROM THE GROUP CONSISTING OF THE SALTS OF ALKALI METALS AND ALKALINE EARTH METALS WITH ACIDS OF THE FORMULA CNH2NO2 WHERE N IS 3-8, WITH BENZOIC ACID AND WITH AROMATIC ACIDS OF THE FORMULA C8H8O2, SAID AQUEOUS SOLUTION CONTAINING AT LEAST 20% OF THE SALT, WHEREBY A SOLUTION OF THE ALCOHOL IN THE AQUEOUS SOLUTION IS OBTAINED AND THEREAFTER SEPARATING SAID ALCOHOL SOLUTION FROM THE VINYL ETHER.
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) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |