US2420388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for feeding granular material into a fluid stream
Assignee: Blaw Knox Co
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Filing: 1945-12-29
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Granted: 1947-05-13
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Expires: 1965-12-29
Abstract
No abstract record available.
Inventors
- 👤 William A Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:50
CPC Classifications
B; B65; B65G; B65G53/00; F; F23; F23K; F23K3/00; B65G2812/00; B65G2812/16; B65G2812/1608; B65G2812/1616; B65G2812/1625; B65G2812/1633
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) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |