Patent US2980291A successfully refreshed from Google Patents.
US2980291A
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Method and apparatus for compounding sinter feed
Assignee: United States Steel Corp
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Filing: 1959-05-01
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Granted: 1961-04-18
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Expires: 1979-05-01
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Schuerger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:13
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/20; C22B1/205; G; G01; G01G; G01G19/00; G01G19/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1139257A
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US1922883A
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US2100878A
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US2653786A
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US2638305A
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US2631827A
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US2727733A
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US2826487A
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US2914395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |