US3020151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation and recovery of metals
Assignee: Individual
•
Filing: 1957-02-26
•
Granted: 1962-02-06
•
Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 John S Nachtman
- 👤 Poole Henry Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:49
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/06; C22B5/04; C22B5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN THE METHOD OF PRODUCING A METAL SELECTED FROM THE GROUP CONSISTING OF COBALT, NICKEL, MOLYBDENUM AND TUNGSTEN BY REACTION FROM THE CORRESPONDING METAL SULFIDES THE STEP OF REACTING THE METAL SULFIDE WITH TIN AS A REDUCING AGENT IN A HYDROGEN ATMOSPHERE WHICH IS REDUCING AS THE TIN UPON HEATING THE MATERIALS TO AN ELEVATED TEMPERATURE WHILE THE TIN IS IN A FLUID STATE TO PRODUCE THE CORRESPONDING METAL IN A RELATIVELY PURIFIED STATE.
Claim 2
Dependent Claim
74 words
IN THE METHOD OF PRODUCING A METAL SELECTED FROM THE GROUP CONSISTING OF COBALT, NICKEL, MOLYBDENUM AND TUNGSTEN BY REACTION FROM THE CORRESPONDING METAL SULFIDES THE STEP OF REACTING THE METAL SULFIDE WITH TIN AS A REDUCING AGENT IN A HYDROGEN ATMOSPHERE WHICH IS REDUCING AS THE TIN UPON HEATING THE MATERIALS TO AN ELEVATED TEMPERATURE WHILE THE TIN IS IN A FLUID STATE TO PRODUCE THE CORRESPONDING METAL IN A RELATIVELY PURIFIED STATE.
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Cited
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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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |