US3504036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of cycloalkane-1,3-diones
Assignee: Berlin-Brandenburg Academy of Sciences and Humanities
•
Filing: 1967-01-19
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Granted: 1970-03-31
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Expires: 1987-01-19
Abstract
No abstract record available.
Inventors
- 👤 Hans Schick
- 👤 Gerhard Lehmann
- 👤 Gunter Hilgetag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:17
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/385; C07C49/403; C07C45/00; C07C45/45; C07C45/48; C07C45/56; C07C45/57; C07C45/59; C07C45/60; C07C49/395
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3356731A
Cited
US3382282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |