Patent US2644583A successfully refreshed from Google Patents.
US2644583A
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Concentration and separation of granular mixtures
Assignee: Canon Inc
•
Filing: 1949-07-05
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Granted: 1953-07-07
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Expires: 1969-07-05
Abstract
No abstract record available.
Inventors
- 👤 Harry B Cannon
- 👤 Oscar H Trudeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:53
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/02; B03B5/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB610516A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |