US2750418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of unsaturated 1, 4-dicarbonyl compounds
Assignee: Kemisk Vaerk Koge AS
•
Filing: 1951-02-26
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Granted: 1956-06-12
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Expires: 1971-02-26
Abstract
No abstract record available.
Inventors
- 👤 Clauson Niels Konrad F Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:43
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/56; C07C45/57; C07C45/59
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
THE METHOD OF PRODUCING AN UNSATURATED 1,4DICARBONYL COMOUND COMPRISING THE HYDROLYZATION OF 2,5-DIACYLOXY-2,5-DIHYDROFURAN IN AQUEOUS MEDIUM
Claim 2
Independent Claim
16 words
THE METHOD OF PRODUCING AN UNSATURATED 1,4DICARBONYL COMOUND COMPRISING THE HYDROLYZATION OF 2,5-DIACYLOXY-2,5-DIHYDROFURAN IN AQUEOUS MEDIUM
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |