US2977221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-cobalt separation
Assignee: Arthur D Little Inc
•
Filing: 1958-11-17
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Granted: 1961-03-28
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Expires: 1978-11-17
Abstract
No abstract record available.
Inventors
- 👤 Harold L Howling
- 👤 Edward S Shanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:34
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0476; C22B23/0484
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
METHOD OF SEPARATING NICKEL AND COBALT, CHARACTERIZED BY THE STEPS OF ADDING TO A SOLUTION OF SALTS OF NICKEL AND COBALT A PRECIPITATING AGENT SELECTED FROM THE GROUP CONSISTING OF PEROXY MONO ACIDS AND SALTS THEREOF, AND ADJUSTING THE PH TO RANGE FROM ABOUT 3 TO ABOUT NEUTRAL.
Claim 2
Dependent Claim
48 words
METHOD OF SEPARATING NICKEL AND COBALT, CHARACTERIZED BY THE STEPS OF ADDING TO A SOLUTION OF SALTS OF NICKEL AND COBALT A PRECIPITATING AGENT SELECTED FROM THE GROUP CONSISTING OF PEROXY MONO ACIDS AND SALTS THEREOF, AND ADJUSTING THE PH TO RANGE FROM ABOUT 3 TO ABOUT NEUTRAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |