US2443732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydration of alkyl ketones
Assignee: Universal Oil Products Co
•
Filing: 1945-04-18
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Granted: 1948-06-22
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Expires: 1965-04-18
Abstract
No abstract record available.
Inventors
- 👤 Vladimir N Ipatieff
- 👤 Carl B Linn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:33
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/74; C07C1/00; C07C1/20; C07C1/207; C07C1/2072; C07C1/2074; C07C2527/00; C07C2527/06; C07C2527/128
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) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |