US3445509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of acetoacetic esters
Assignee: Hoechst AG
•
Filing: 1965-06-22
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Granted: 1969-05-20
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Expires: 1985-06-22
Abstract
No abstract record available.
Inventors
- 👤 Otto Probst
- 👤 Lothar Hornig
- 👤 Lothar Hirsch
- 👤 Helmut Gosse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:35
CPC Classifications
C; C07; C07D; C07D305/00; C07D305/02; C07D305/10; C07D305/12; C07C; C07C67/00; C07C67/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2351366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |