US2684273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agitator unit
Assignee: United States Steel Corp
•
Filing: 1951-12-14
•
Granted: 1954-07-20
•
Expires: 1971-12-14
Abstract
No abstract record available.
Inventors
- 👤 William A Fears
- 👤 Elmer G Steuber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:00
CPC Classifications
B; B01; B01F; B01F35/00; B01F35/30; B01F35/32; B01F35/322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE505549C
Cited
US1113452A
Cited
US1479304A
Cited
DE377189C
Cited
US1730713A
Cited
US2221725A
Cited
US2349131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |