Patent US3463472A successfully refreshed from Google Patents.
US3463472A
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US
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Apparatus for the direct smelting of metallic ores
Assignee: Conzinc Riotinto of Australia Ltd
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Filing: 1967-01-05
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Granted: 1969-08-26
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Expires: 1987-01-05
Abstract
No abstract record available.
Inventors
- 👤 Howard K Worner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:22
CPC Classifications
C; C22; C22B; C22B19/00; C22B19/04; C03; C03B; C03B5/00; C03B5/04; C03B5/12; C21; C21B; C21B13/00; C21B13/10; C21C; C21C1/00; C21C5/00; C21C5/28; C21C5/42; C21C5/56; C21C5/567; C22B13/00; C22B15/00; C22B15/0026; C22B15/0028; C22B15/003; C22B15/0045; C22B15/0054; C22B15/006; C22B23/00; C22B23/02; C22B23/025; C22B25/00; C22B5/00; C22B9/00; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y10; Y10S; Y10S75/00; Y10S75/957
Claims Analysis
Total Claims: 0
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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) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |