US2604261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal particle separator
Assignee: Individual
•
Filing: 1949-05-28
•
Granted: 1952-07-22
•
Expires: 1969-05-28
Abstract
No abstract record available.
Inventors
- 👤 Silverstolpe Karl Oska Lennart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:58
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0407; B04B5/0414; B04B5/0421; B42; B42D; B42D3/00; B42D3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE43103C
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US444162A
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US660746A
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US986130A
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US1839944A
Cited
DE643836C
Cited
US2110308A
Cited
US2202157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |