US2662641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for separating and classifying substantially spherical bodies into different size groups
Assignee: Noranda Inc
•
Filing: 1951-06-20
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Granted: 1953-12-15
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Expires: 1971-06-20
Abstract
No abstract record available.
Inventors
- 👤 Charles W Clark
- 👤 Bernard H Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:45
CPC Classifications
B; B07; B07B; B07B13/00; B07B13/10; B07B13/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1259435A
Cited
GB235738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |