US3080156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for reducing metal oxides without melting
Assignee: Freeman Corp
•
Filing: 1960-03-23
•
Granted: 1963-03-05
•
Expires: 1980-03-23
Abstract
No abstract record available.
Inventors
- 👤 Freeman Horace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:23
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/08; C22; C22B; C22B5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1566103A
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US1938832A
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US2348673A
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US2592783A
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GB674236A
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US2747988A
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US2792298A
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US2944887A
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US2900236A
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US2855290A
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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) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |