US2131120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of organic compounds containing basic substituents
Assignee: IG Farbenindustrie AG
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Filing: 1935-10-31
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Granted: 1938-09-27
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Expires: 1955-10-31
Abstract
No abstract record available.
Inventors
- 👤 Schlack Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:12
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/22; C07D303/34; C07D303/36; C08; C08B; C08B13/00; C08B15/00; C08B15/05; C08B15/06; D; D06; D06P; D06P5/00; D06P5/22
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) | 1941-09-26 | 1942-03-28 | 1942-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-09-26 | 1946-03-28 | 1946-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-09-26 | 1950-03-28 | 1950-09-27 | $7700.00 | Window Closed / Lapsed |