US3456015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of allene ketones
Assignee: F Hoffmann La Roche AG
•
Filing: 1965-02-08
•
Granted: 1969-07-15
•
Expires: 1985-02-08
Abstract
No abstract record available.
Inventors
- 👤 Roman Marbet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:27
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/02; C07C403/14; C07C403/16; C07C45/00; C07C45/51; C07C45/511; C07C45/513; C07C45/515; C11; C11B; C11B9/00; C11B9/0007; C11B9/0015; C11B9/0026; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3029287A
Cited
US3337634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |