US2772295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing esters of 3-substituted 2-furoic acids
Assignee: Eastman Kodak Co
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Filing: 1953-02-02
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Granted: 1956-11-27
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Expires: 1973-02-02
Abstract
No abstract record available.
Inventors
- 👤 Donald M Burness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:14
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/36; C07D303/00; C07D303/02; C07D303/48; C07D307/56; C07D307/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS OF MANUFACTURING A LOWER ALKYL ESTER OF A 2-FUROIC ACID SUBSTITUTED IN THE 3-POSITION BY A HYDROCARBON SUBSTITUENT SELECTED FROM THE LOWER ALKYL GROUPS AND THE PHENYL GROUP, WHICH COMPRISES HEATING AT A TEMPERATURE OF FROM ABOUT 160*C. TO ABOUT 250*C., A LOWER ALKYL ESTER OF A 5,5-DIMETHOXY-2,3-EPOXYPENTANOATE SUBSTITUTED IN THE 3-POSITION BY A HYDROCARBON SUBSTITUENT SELECTED FROM THE LOWER ALKYL GROUP AND THE PHENYL GROUP.
Claim 2
Dependent Claim
68 words
A PROCESS OF MANUFACTURING A LOWER ALKYL ESTER OF A 2-FUROIC ACID SUBSTITUTED IN THE 3-POSITION BY A HYDROCARBON SUBSTITUENT SELECTED FROM THE LOWER ALKYL GROUPS AND THE PHENYL GROUP, WHICH COMPRISES HEATING AT A TEMPERATURE OF FROM ABOUT 160*C. TO ABOUT 250*C., A LOWER ALKYL ESTER OF A 5,5-DIMETHOXY-2,3-EPOXYPENTANOATE SUBSTITUTED IN THE 3-POSITION BY A HYDROCARBON SUBSTITUENT SELECTED FROM THE LOWER ALKYL GROUP AND THE PHENYL GROUP.
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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |