US3528784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preliminary beneficiation of calcareous oxidized copper ores by flotation of a high acid-consuming fraction containing low copper values from a low acid-consuming fraction containing higher copper values
Assignee: Banner Mining Co
•
Filing: 1968-03-21
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Granted: 1970-09-15
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Expires: 1988-03-21
Abstract
No abstract record available.
Inventors
- 👤 George E Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:23
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US955012A
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US1291824A
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US1671698A
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US1843526A
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US1972247A
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US2069365A
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US2106800A
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US2231265A
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US2620068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |