US2795464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for fluidizing and conveying granular material
Assignee: SUPERIOR SEPARATOR Co
•
Filing: 1955-02-16
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Granted: 1957-06-11
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Expires: 1975-02-16
Abstract
No abstract record available.
Inventors
- 👤 William B Richards
- 👤 William B Burnet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:28
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/46; B65G53/4608; B65G53/4625; B65G53/4633; B65G53/4641; B01; B01J; B01J8/00; B01J8/0015; B01J8/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1935977A
Cited
US1999430A
Cited
US1943589A
Cited
US2293871A
Cited
US2585472A
Cited
US2712475A
Cited
US2712963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |