Patent DE548565C successfully refreshed from Google Patents.
Patent US2726764A successfully refreshed from Google Patents.
US2726764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heavy media separation process
Assignee: Stamicarbon BV
•
Filing: 1952-09-09
•
Granted: 1955-12-13
•
Expires: 1972-09-09
Abstract
No abstract record available.
Inventors
- 👤 Freerk J Fontein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:01
CPC Classifications
B; B03; B03B; B03B9/00; B04; B04C; B04C9/00; B04C2009/002
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB651587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |