Patent US2408311A successfully refreshed from Google Patents.
US2408311A
Expired / Lapsed
US
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Removal of sulphur in recovery of nickel
Assignee: Nicaro Nickel Co
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Filing: 1943-02-16
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Granted: 1946-09-24
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Expires: 1963-02-16
Abstract
No abstract record available.
Inventors
- 👤 Robert C Hills
- 👤 Maurice F Dufour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:49
CPC Classifications
C; C01; C01G; C01G53/00; C01G53/06; C22; C22B; C22B23/00; C22B23/04; C22B23/0453; C22B23/0461; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1949-09-23 | 1950-03-25 | 1950-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-23 | 1954-03-25 | 1954-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-23 | 1958-03-25 | 1958-09-24 | $7700.00 | Window Closed / Lapsed |