Patent US2794052A successfully refreshed from Google Patents.
US2794052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of diacyl
Assignee: —
•
Filing: —
•
Granted: 1957-05-28
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Expires: 1974-05-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:06
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/45; C07C45/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS FOR PREPARING 4,6-DIACYL RESORCINOLS SUBSTANTIALLY FREE FROM THE 2,4-ISOMER, COMPRISING SUBJECTING A RESORCINOL DIALKYL ETHER TO THE ACTION OF AN ACYL CHLORIDE AND ALUMINUM CHLORIDE AT A FIRST TEMPERATURE AT WHICH SAID ETHER IS NOT CLEAVED UNTIL AT LEAST TWO ACYL GROUPS HAVE BEEN SUBSTITUTED IN THE RESORCINOL NUCLEUS, AND THEREAFTER RAISING THE TEMPERATURE TO ONE AT WHICH SAID ETHER LINKAGES ARE CLEAVED, TO PRODUCE 4,6-DIACYL RESORCINOL.
Claim 2
Dependent Claim
69 words
A PROCESS FOR PREPARING 4,6-DIACYL RESORCINOLS SUBSTANTIALLY FREE FROM THE 2,4-ISOMER, COMPRISING SUBJECTING A RESORCINOL DIALKYL ETHER TO THE ACTION OF AN ACYL CHLORIDE AND ALUMINUM CHLORIDE AT A FIRST TEMPERATURE AT WHICH SAID ETHER IS NOT CLEAVED UNTIL AT LEAST TWO ACYL GROUPS HAVE BEEN SUBSTITUTED IN THE RESORCINOL NUCLEUS, AND THEREAFTER RAISING THE TEMPERATURE TO ONE AT WHICH SAID ETHER LINKAGES ARE CLEAVED, TO PRODUCE 4,6-DIACYL RESORCINOL.
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) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |