US3728105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction of metal values from manganese deep sea nodules
Assignee: Kennecott Utah Copper LLC
•
Filing: 1970-11-16
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Granted: 1973-04-17
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Expires: 1990-11-16
Abstract
Abstract COPPER, NICKEL, COBALT AND MOLYBDENUM MAY BE LEACHED FROM DEEP SEA MANGANESE NODULES USING AN AQUEOUS AMMONIACAL AMMONIUM SOLUTON AT ELEVATED TEMPERATURES AND PRESSURES.
Inventors
- 👤 R Skarbo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:53
CPC Classifications
C; C22; C22B; C22B47/00; C22B47/0018; C22B47/0045; C22B47/0054; C22B47/0072; C22B3/00; C22B3/04; C22B3/06; C22B3/10; C22B3/12; C22B3/14; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/04
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |