US2543312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous acetals and process for producing and hydrolyzing the same to produce unsaturated aldehydes
Assignee: GAF Chemicals Corp
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Filing: 1948-11-13
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Granted: 1951-02-27
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Expires: 1968-11-13
Abstract
No abstract record available.
Inventors
- 👤 John W Copenhaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:07
CPC Classifications
C; C07; C07C; C07C47/00; C07C47/20; C07C47/228; C07C47/232; C07C45/00; C07C45/51; C07C45/511; C07C45/513; C07C45/61; C07C45/67; C07C45/68; C07C45/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE PROCESS OF PRODUCING A,B-UNSATURATED ALDEHYDES WHICH COMPRISES REACTING A VINYL ETHER OF THE FORMULA R-O-CH=CH2 WHEREIN R REPRES ENTS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL AND ARALKYL WITH AN ALDEHYDE IN THE PRESENCE OF THE METALLIC HALIDE FRIEDEL-CRAFTS CATALYST AT A TEMPERATURE OF FROM 0-50* C. AND THEN HYDROLYZING THE THUS OBTAINED PRIMARY REACTION PRODUCT IN AN ACIDIC AQUEOUS MEDIUM AT A TEMPERATURE IN EXCESS OF 50* C. TO OBTAIN AN A,B-UNSATURATED ALDEHYDE OF TWO MORE CARBON ATOMS THAN THE ORIGINAL ALDEHYDE.
Claim 2
Dependent Claim
88 words
THE PROCESS OF PRODUCING A,B-UNSATURATED ALDEHYDES WHICH COMPRISES REACTING A VINYL ETHER OF THE FORMULA R-O-CH=CH2 WHEREIN R REPRES ENTS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL AND ARALKYL WITH AN ALDEHYDE IN THE PRESENCE OF THE METALLIC HALIDE FRIEDEL-CRAFTS CATALYST AT A TEMPERATURE OF FROM 0-50* C. AND THEN HYDROLYZING THE THUS OBTAINED PRIMARY REACTION PRODUCT IN AN ACIDIC AQUEOUS MEDIUM AT A TEMPERATURE IN EXCESS OF 50* C. TO OBTAIN AN A,B-UNSATURATED ALDEHYDE OF TWO MORE CARBON ATOMS THAN THE ORIGINAL ALDEHYDE.
References Cited (Backward Citations)
US2104000A
Cited
US2223171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |