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Patent US2432499A successfully refreshed from Google Patents.
US2432499A
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Acetylation of beta-ketonic compounds
Assignee: Carbide and Carbon Chemicals Corp
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Filing: 1943-05-15
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Granted: 1947-12-16
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Expires: 1963-05-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert B Boese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:25
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/76; C07C49/00; C07C49/04; C07C49/12; C07C49/14; C07C49/76
Claims Analysis
Total Claims: 0
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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) | 1950-12-15 | 1951-06-16 | 1951-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-15 | 1955-06-16 | 1955-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-15 | 1959-06-16 | 1959-12-16 | $7700.00 | Window Closed / Lapsed |