US3679397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bacterial leaching process
Assignee: REGENTS NEW MEXICO INST OF MIN
•
Filing: 1969-12-29
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Granted: 1972-07-25
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Expires: 1989-12-29
Abstract
Abstract A PROCESS FOR LEACHING METALLIC CONSTITUENTS FROM METALLURGICAL MATERIALS AND LIXIVIANT COMPOSITION THEREFOR WHEREIN THE LIXIVIANT SOLUTION CONTAINS FERROUS SULFATE, BACTERIA AND CARBAMIDE PHOSPHORIC ACID (UREA PHOSPHORIC ACID).
Inventors
- 👤 Lawrence T O'connor
- 👤 James A Brierley
- 👤 Roshan B Bhappu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:44
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/18; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/17; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |