US2534702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclone separator
Assignee: Directie van de Staatsmijnen in Limburg
•
Filing: 1946-08-14
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Granted: 1950-12-19
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Expires: 1966-08-14
Abstract
No abstract record available.
Inventors
- 👤 Maximiliaan G Driessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:30
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/08; B04C5/081; B04C5/02; B04C5/12; B04C5/14; B04C5/16; B04C9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE57996C
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US450372A
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US530642A
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GB189906892A
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GB190800603A
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US1959628A
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FR741480A
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FR43249E
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US2033470A
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US2085506A
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FR48918E
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US2349831A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |