US2779720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser
Assignee: —
•
Filing: —
•
Granted: 1957-01-29
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Expires: 1974-01-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:52
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/06; C07C41/00; C07C41/01; C07C41/34; C07C41/40; C07C41/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR SEPARATING AN ALIPHATIC VINYL ETHER FROM A MIXTURE WITH AN ALIPHATIC ALKANOL WHICH COMPRISES HEATING SAID MIXTURE IN THE PRESENCE OF WATER SUFFICIENT TO FORM A CONSTANT BOILING MIXTURE WITH SUBSTANTIALLY ALL THE VINYL ETHER IN THE MIXTURE, AND AN ORGANIC SOLVENT HAVING THE GENERAL FORMULA HO(CH2CH2O-)XR1, WHERE R1 IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, LOWER ALKYL, AND LOWER ALKOXYALKYL GROUPS, AND X IS AN INTEGER NO HIGHER THAN 4, AND HAVING A BOILING POINT HIGHER THAN THE CONSTANT-BOILING MIXTURE OF WATER AND THE VINYL ETHER, DISTILLING OVERHEAD SAID CONSTANT BOILING MIXTURE, AND CONDENSING SAID MIXTURE TO RECOVER THE VINYL ETHER.
Claim 2
Dependent Claim
106 words
A PROCESS FOR SEPARATING AN ALIPHATIC VINYL ETHER FROM A MIXTURE WITH AN ALIPHATIC ALKANOL WHICH COMPRISES HEATING SAID MIXTURE IN THE PRESENCE OF WATER SUFFICIENT TO FORM A CONSTANT BOILING MIXTURE WITH SUBSTANTIALLY ALL THE VINYL ETHER IN THE MIXTURE, AND AN ORGANIC SOLVENT HAVING THE GENERAL FORMULA HO(CH2CH2O-)XR1, WHERE R1 IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, LOWER ALKYL, AND LOWER ALKOXYALKYL GROUPS, AND X IS AN INTEGER NO HIGHER THAN 4, AND HAVING A BOILING POINT HIGHER THAN THE CONSTANT-BOILING MIXTURE OF WATER AND THE VINYL ETHER, DISTILLING OVERHEAD SAID CONSTANT BOILING MIXTURE, AND CONDENSING SAID MIXTURE TO RECOVER THE VINYL ETHER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |