US1813478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of catalysts
Assignee: IG Farbenindustrie AG
•
Filing: 1929-06-20
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Granted: 1931-07-07
•
Expires: 1949-06-20
Abstract
No abstract record available.
Inventors
- 👤 Andrussow Leonid
- 👤 Duerr Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:26
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/1802; B01J27/1806
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) | 1934-07-06 | 1935-01-05 | 1935-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-06 | 1939-01-05 | 1939-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-06 | 1943-01-05 | 1943-07-07 | $7700.00 | Window Closed / Lapsed |