US1843006A
Expired / Lapsed
US
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Removal of silica from metal-bearing solutions
Assignee: RHODESIA BROKEN HILL DEV COMPA
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Filing: 1926-09-24
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Granted: 1932-01-26
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Expires: 1946-09-24
Abstract
No abstract record available.
Inventors
- 👤 Stevens Royale Hillman
- 👤 Norris Gerald Chad
- 👤 Watson William Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:07
CPC Classifications
C; C22; C22B; C22B19/00; C22B19/20; C22B19/26; C22B15/00; C22B15/0063; C22B15/0084; C22B15/0086; C22B3/00; C22B3/20; C22B3/44; C22B34/00; C22B34/20; C22B34/22; 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) | 1935-01-25 | 1935-07-27 | 1936-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-01-25 | 1939-07-27 | 1940-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-01-25 | 1943-07-27 | 1944-01-26 | $7700.00 | Window Closed / Lapsed |