Patent US3025965A successfully refreshed from Google Patents.
US3025965A
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Hydraulic cyclone unit
Assignee: Phillips Petroleum Co
•
Filing: 1957-10-10
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Granted: 1962-03-20
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Expires: 1977-10-10
Abstract
No abstract record available.
Inventors
- 👤 William E Bergman
- 👤 Stanley J Marwil
- 👤 Charles J Engle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:57
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/14; B04C5/16
Claims Analysis
Total Claims: 0
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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) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |