US2573192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclone
Assignee: Directie van de Staatsmijnen in Limburg
•
Filing: 1946-12-09
•
Granted: 1951-10-30
•
Expires: 1966-12-09
Abstract
No abstract record available.
Inventors
- 👤 Fontein Freerk Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:32
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/26; B01D21/267; B04; B04C; B04C5/00; B04C5/08; B04C5/081
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US446053A
Cited
US709956A
Cited
US938702A
Cited
US1265763A
Cited
US1832256A
Cited
US2377524A
Cited
US2471326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |