Patent US2560175A successfully refreshed from Google Patents.
US2560175A
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Fluidizing reduction of zinc compounds with stagewise feeding of solids
Assignee: American Metal Co Ltd
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Filing: 1948-05-12
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Granted: 1951-07-10
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Expires: 1968-05-12
Abstract
No abstract record available.
Inventors
- 👤 John C Kalbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:40
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/10; C22B19/00; C22B19/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
IN THE STAGEWISE REDUCTION OF A SOLID INORGANIC OXYGEN-CONTAINING COMPOUND OF ZINC BY REACTION WITH A SOLID CARBONACEOUS REDUCING AGENT, BOTH OF SAID REACTING SOLIDS BEING IN COMMINUTED FORM AND BEING INTRODUCED INTO THE FIRST REDUCING STAGE, UNDER FLUIDIZING CONDITIONS FOR THE RECOVERY OF ZINC, WHEREIN SAID REACTING SOLIDS AND THE RESULTING REACTION GASES CONCURRENTLY
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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) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |