Patent US1948419A successfully refreshed from Google Patents.
US1948419A
Expired / Lapsed
US
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Method of and means for the magnetic separation of materials
Assignee: Individual
•
Filing: 1930-06-10
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Granted: 1934-02-20
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Expires: 1950-06-10
Abstract
No abstract record available.
Inventors
- 👤 Granigg Bartel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:59
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/10; B03C1/14; B03C1/025; B03C1/031; B03C1/033; B03C1/0335; B03C1/28; B03C1/284; B03C1/286; B03C2201/00; B03C2201/18; B03C2201/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-02-19 | 1937-08-21 | 1938-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-02-19 | 1941-08-21 | 1942-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-02-19 | 1945-08-21 | 1946-02-20 | $7700.00 | Window Closed / Lapsed |