US1919730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous metal and metal oxide
Assignee: IG Farbenindustrie AG
•
Filing: 1930-06-10
•
Granted: 1933-07-25
•
Expires: 1950-06-10
Abstract
No abstract record available.
Inventors
- 👤 Koenig Josef
- 👤 Stoewener Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:54
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/14; B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1121; B22F3/1125; B22F2003/1131; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49709
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1936-07-24 | 1937-01-23 | 1937-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-07-24 | 1941-01-23 | 1941-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-07-24 | 1945-01-23 | 1945-07-25 | $7700.00 | Window Closed / Lapsed |