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US2806882A
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Acyclic ketone
Assignee: F Hoffmann La Roche AG
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Filing: 1954-09-16
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Granted: 1957-09-17
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Expires: 1974-09-16
Abstract
No abstract record available.
Inventors
- 👤 Surmatis Joseph Donald
- 👤 Weber Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:48
CPC Classifications
C; C11; C11B; C11B9/00; C11B9/0007; C11B9/0015; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/673; C07C45/676; C07C49/00; C07C49/20; C07C49/203
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2760998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |