Patent US2672371A successfully refreshed from Google Patents.
US2672371A
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US
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Transportation of solids through pipe lines
Assignee: Consolidation Coal Co
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Filing: 1952-01-15
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Granted: 1954-03-16
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Expires: 1972-01-15
Abstract
No abstract record available.
Inventors
- 👤 Sam A Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:37
CPC Classifications
F; F04; F04D; F04D13/00; B; B65; B65G; B65G53/00; B65G53/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US599658A
Cited
US2471498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |