US2489264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum-type magnetic separator
Assignee: Richmond Manufacturing Co
•
Filing: 1944-08-04
•
Granted: 1949-11-29
•
Expires: 1964-08-04
Abstract
No abstract record available.
Inventors
- 👤 Jr William Byrd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:16
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/10; B03C1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US567381A
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US676840A
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US893606A
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US1369516A
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US1407051A
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GB261410A
Cited
US1712808A
Cited
GB461816A
Cited
GB523205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |