US3788841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of metal values from manganese nodules
Assignee: Kennecott Utah Copper LLC
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Filing: 1971-09-28
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Granted: 1974-01-29
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Expires: 1991-09-28
Abstract
Abstract THIS INVENTION CONCERNS A METHOD FOR RECOVERY OF COPPER, NICKEL, COBALT AND MOLYBDENUM FROM DEEP SEA MANGANESE NODULES IN WHICH THE NODULES ARE GROUND, BALLED, ROASTED AND LEACHED.
Inventors
- 👤 J Agarwal
- 👤 T Wilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:48
CPC Classifications
C; C22; C22B; C22B47/00; C22B47/0018; C22B47/0027; C22B3/00; C22B5/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/04
Claims Analysis
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |