US3214022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning hydrocyclones
Assignee: Bird Machine Co Inc
•
Filing: 1956-06-11
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Granted: 1965-10-26
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Expires: 1976-06-11
Abstract
No abstract record available.
Inventors
- 👤 Wikdahl Nils Anders Lennart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:56
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/14
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |