US2810680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of oxo aldehydes with magnesia
Assignee: Ruhrchemie AG
•
Filing: 1952-10-21
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Granted: 1957-10-22
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Expires: 1972-10-21
Abstract
No abstract record available.
Inventors
- 👤 Buchner Karl
- 👤 Kuhnel Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:47
CPC Classifications
C; C07; C07C; C07C27/00; C07C27/20; C07C27/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2694734A
Cited
GB660737A
Cited
US2636903A
Cited
US2694735A
Cited
US2686206A
Cited
US2688591A
Cited
US2679534A
Cited
US2638487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |