US2485604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidizing process for producing zinc
Assignee: American Metal Co Ltd
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Filing: 1947-07-08
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Granted: 1949-10-25
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Expires: 1967-07-08
Abstract
No abstract record available.
Inventors
- 👤 John C Kalbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:46
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/10; C22B19/00; C22B19/04
Claims Analysis
Total Claims: 0
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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) | 1952-10-24 | 1953-04-25 | 1953-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-24 | 1957-04-25 | 1957-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-24 | 1961-04-25 | 1961-10-25 | $7700.00 | Window Closed / Lapsed |