Patent US1370898A successfully refreshed from Google Patents.
US1370898A
Expired / Lapsed
US
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Method of and means for treating finely-crushed ores and other materials
Assignee: Individual
•
Filing: 1920-05-20
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Granted: 1921-03-08
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Expires: 1940-05-20
Abstract
No abstract record available.
Inventors
- 👤 Middlemiss Edward Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:03
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/02; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0269; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1924-03-07 | 1924-09-06 | 1925-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-03-07 | 1928-09-06 | 1929-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-03-07 | 1932-09-06 | 1933-03-08 | $7700.00 | Window Closed / Lapsed |