US1891043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydro-aromatic ketones
Assignee: IG Farbenindustrie AG
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Filing: 1929-06-11
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Granted: 1932-12-13
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Expires: 1949-06-11
Abstract
No abstract record available.
Inventors
- 👤 Diels Otto
- 👤 Alder Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:12
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/24; C07C403/14; C07C403/16; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/69; C07C45/72; C07C45/74; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-12-13 | 1936-06-13 | 1936-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-12-13 | 1940-06-13 | 1940-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-12-13 | 1944-06-13 | 1944-12-13 | $7700.00 | Window Closed / Lapsed |