US2997205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling discharge of materials
Assignee: United States Steel Corp
•
Filing: 1958-06-04
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Granted: 1961-08-22
•
Expires: 1978-06-04
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Schuerger
- 👤 Slamar Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:30
CPC Classifications
G; G01; G01G; G01G11/00; G01G11/08; G01G11/083; B; B65; B65G; B65G47/00; G01G11/006; B65G2814/00; B65G2814/03; B65G2814/0344
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1922883A
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US2040157A
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US1983093A
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US2147422A
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US2261655A
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US2381505A
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US2658644A
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US2618395A
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GB729633A
Cited
US2737997A
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US2797702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |