US3223725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of esters through the use of friedel-crafts catalysts
Assignee: Individual
•
Filing: 1956-05-17
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Granted: 1965-12-14
•
Expires: 1976-05-17
Abstract
No abstract record available.
Inventors
- 👤 Marion E Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:15
CPC Classifications
C; C07; C07C; C07C205/00; C07C205/39; C07C205/40; C07C201/00; C07C201/06; C07C201/12; C07C205/42; C07C205/49; C07C205/50; C07C205/51; C07C205/57; C07C227/00; C07C227/14; C07C227/18; C07C227/20; C07C229/00; C07C229/02; C07C229/04; C07C229/20; C07C67/00; C07C67/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD OF PREPARING ESTERS OF ALIPHATIC ALCOHOLS COMPRISING REACTING A PRMARY, SATURATED LOWER ALIPHATIC ALCOHOL SUBSTITUTED IN THE BETA POSITION WITH A SUBSTITUENT SELECTED FROM A GROUP CONSISTING OF NO2, CL, BR, AND F WITH AN ACID CHLORIDE IN THE PRESENCE OF A METAL HALIDE CATALYST OF THE FRIEDEL-CRAFTS TYPE SAID METAL HALIDE BEING PRESENT IN A QUANTITY RANGING FROM ABOUT 1.5 PERCENT TO NOT MORE THAN ABOUT 100 PERCENT MOLAR EQUIVALENT OF SAID ACID CHLORIDE.
Claim 2
Independent Claim
77 words
A METHOD OF PREPARING ESTERS OF ALIPHATIC ALCOHOLS COMPRISING REACTING A PRMARY, SATURATED LOWER ALIPHATIC ALCOHOL SUBSTITUTED IN THE BETA POSITION WITH A SUBSTITUENT SELECTED FROM A GROUP CONSISTING OF NO2, CL, BR, AND F WITH AN ACID CHLORIDE IN THE PRESENCE OF A METAL HALIDE CATALYST OF THE FRIEDEL-CRAFTS TYPE SAID METAL HALIDE BEING PRESENT IN A QUANTITY RANGING FROM ABOUT 1.5 PERCENT TO NOT MORE THAN ABOUT 100 PERCENT MOLAR EQUIVALENT OF SAID ACID CHLORIDE.
References Cited (Backward Citations)
US2345006A
Cited
GB698138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |