Patent US2830674A successfully refreshed from Google Patents.
US2830674A
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Apparatus for transporting pulverulent materials
Assignee: Buehler AG
•
Filing: 1954-02-09
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Granted: 1958-04-15
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Expires: 1974-02-09
Abstract
No abstract record available.
Inventors
- 👤 Hans R Dolf
- 👤 Spiess Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:52
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1766666A
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US1910088A
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US2141772A
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US2393766A
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US2496180A
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US2626012A
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GB697328A
Cited
US2633206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |