Patent US2499725A successfully refreshed from Google Patents.
US2499725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making esters of monocarboxylic acids
Assignee: EIDP Inc
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Filing: 1948-02-06
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Granted: 1950-03-07
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Expires: 1968-02-06
Abstract
No abstract record available.
Inventors
- 👤 Harry B Copelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:19
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C43/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS FOR OBTAINING MONOCARBOXYLIC ACID ESTERS, SAID PROCESS COMPRISING REACTING AT A TEMPERATURE OF FROM 20* TO 160*C. TETRAHYDROFURAN WITH AN ANHYDRIDE OF AN ALIPHATIC MONOCARBOXYLIC ACID IN CONTACT WITH BORON TRIFLUORIDE CATALYST.
Claim 2
Dependent Claim
34 words
A PROCESS FOR OBTAINING MONOCARBOXYLIC ACID ESTERS, SAID PROCESS COMPRISING REACTING AT A TEMPERATURE OF FROM 20* TO 160*C. TETRAHYDROFURAN WITH AN ANHYDRIDE OF AN ALIPHATIC MONOCARBOXYLIC ACID IN CONTACT WITH BORON TRIFLUORIDE CATALYST.
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) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |