US2655411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for handling fluidizable finely divided solid materials
Assignee: Standard Oil Development Co
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Filing: 1952-01-02
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Granted: 1953-10-13
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Expires: 1972-01-02
Abstract
No abstract record available.
Inventors
- 👤 Lester H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:20
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/002
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) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |