US2874801A
Expired / Lapsed
US
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Dust-separators consisting of a set of cyclones connected in parallel and having each at least one tangential inlet opening
Assignee: Bureau Van Tongeren N V
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Filing: 1955-11-18
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Granted: 1959-02-24
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Expires: 1975-11-18
Abstract
No abstract record available.
Inventors
- 👤 Kolk Hendrik Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:25
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; H01J37/32917; H01J37/32935; B; B01; B01J; B01J19/00; B01J19/08; B01J19/087; B01J19/088; B04; B04C; B04C5/00; B04C5/02; B04C5/04; B04C5/24; B04C5/28; C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/80; C07C29/82; C07C29/86; C22; C22B; C22B4/00; C23; C23C; C23C8/00; C23C8/06; C23C8/36; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; H01J37/32009; H01J37/32018; Y; Y10; Y10S; Y10S422/00; Y10S422/907
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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |