Patent US3464904A successfully refreshed from Google Patents.
US3464904A
Expired / Lapsed
US
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Method for treating metallic sulfide compounds
Assignee: Banner Mining Co
•
Filing: 1964-12-21
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Granted: 1969-09-02
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Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Eldred C Brace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:04
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US598180A
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US846642A
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US1133059A
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US1224057A
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US1587438A
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US1886163A
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US2273798A
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GB558722A
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US2827426A
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US2794777A
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US3257334A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |