US2661575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for fluffing slag
Assignee: United States Steel Corp
•
Filing: 1950-10-26
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Granted: 1953-12-08
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Expires: 1970-10-26
Abstract
No abstract record available.
Inventors
- 👤 Truman H Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:19
CPC Classifications
C; C21; C21B; C21B3/00; C21B3/04; C21B3/06; B; B28; B28B; B28B1/00; B28B1/54; C21B2400/00; C21B2400/02; C21B2400/022; C21B2400/024; C21B2400/05; C21B2400/06; Y; Y02; Y02W; Y02W30/00; Y02W30/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |