Patent US1849658A successfully refreshed from Google Patents.
US1849658A
Expired / Lapsed
US
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Apparatus for treatment of iron ore
Assignee: Brassert & Co
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Filing: 1929-02-04
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Granted: 1932-03-15
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Expires: 1949-02-04
Abstract
No abstract record available.
Inventors
- 👤 Herman A Brassert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:11
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/18; C21B13/00; C21B13/14
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) | 1935-03-15 | 1935-09-14 | 1936-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-03-15 | 1939-09-14 | 1940-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-03-15 | 1943-09-14 | 1944-03-15 | $7700.00 | Window Closed / Lapsed |