US2644583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration and separation of granular mixtures
Assignee: Canon Inc
•
Filing: 1949-07-05
•
Granted: 1953-07-07
•
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 08:06
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/02; B03B5/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US800293A
Cited
US822753A
Cited
US926031A
Cited
US1068162A
Cited
US1252273A
Cited
US1294603A
Cited
FR486112A
Cited
US1811408A
Cited
US2171674A
Cited
US2228607A
Cited
GB610516A
Cited
US2579110A
Cited
US2484203A
Cited
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 |