US2839579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of ketones
Assignee: F Hoffmann La Roche AG
•
Filing: 1956-06-27
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Granted: 1958-06-17
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Expires: 1976-06-27
Abstract
No abstract record available.
Inventors
- 👤 Kimel Walter
- 👤 Sax Norbert William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:18
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/673; C07C45/676
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS FOR THE PRODUCTION OF UNSATURATED KETONES HAVING THE FORMULA
Claim 2
Dependent Claim
11 words
A PROCESS FOR THE PRODUCTION OF UNSATURATED KETONES HAVING THE FORMULA
References Cited (Backward Citations)
FR1079129A
Cited
US2661368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |