US2616563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal classifier for segregating finely divided particles on the basis of size and density
Assignee: Sharples Corp
•
Filing: 1948-04-24
•
Granted: 1952-11-04
•
Expires: 1968-04-24
Abstract
No abstract record available.
Inventors
- 👤 Malcolm H Hebb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:20
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/12; B04C1/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US416124A
Cited
US2032827A
Cited
US2276761A
Cited
GB506488A
Cited
US2338779A
Cited
GB544397A
Cited
US2329299A
Cited
US2390678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |