Patent US2648535A successfully refreshed from Google Patents.
US2648535A
Expired / Lapsed
US
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Apparatus for gaseous reduction of iron ore
Assignee: Individual
•
Filing: 1950-07-10
•
Granted: 1953-08-11
•
Expires: 1970-07-10
Abstract
No abstract record available.
Inventors
- 👤 Ramsay Erskine
- 👤 Robert T Bagby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:56
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/08; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US109355A
Cited
US236648A
Cited
US1544111A
Cited
US1759173A
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US1891850A
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US1938832A
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US2036578A
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US2158689A
Cited
US2113058A
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US2235154A
Cited
US2384971A
Cited
US2500553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |