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US2919159A
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Pneumatic conveying method and system
Assignee: Pechiney SA
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Filing: 1957-06-07
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Granted: 1959-12-29
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Expires: 1977-06-07
Abstract
No abstract record available.
Inventors
- 👤 Lacroix Seraphin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:05
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/04; B65G53/16; B65G2812/00; B65G2812/16; B65G2812/1608; B65G2812/1641
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) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |