US1948002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of carbamates
Assignee: IG Farbenindustrie AG
•
Filing: 1929-11-30
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Granted: 1934-02-20
•
Expires: 1949-11-30
Abstract
No abstract record available.
Inventors
- 👤 Mittasch Alwin
- 👤 Chall Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:28
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/16; C01C3/18; C01B; C01B21/00; C01B21/082; C01B21/12; C01B21/125
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) | 1937-02-19 | 1937-08-21 | 1938-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-02-19 | 1941-08-21 | 1942-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-02-19 | 1945-08-21 | 1946-02-20 | $7700.00 | Window Closed / Lapsed |