US2954871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclonic separation of drilling fluids
Assignee: Pan American Petroleum Corp
•
Filing: 1956-07-30
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Granted: 1960-10-04
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Expires: 1976-07-30
Abstract
No abstract record available.
Inventors
- 👤 James L Lummus
- 👤 Jr Platho P Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:23
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/08; B04C5/081; E; E21; E21B; E21B21/00; E21B21/06; E21B21/063; E21B21/065; Y; Y10; Y10S; Y10S241/00; Y10S241/30
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) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |