US2961154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge system
Assignee: Houston Oil Field Material Co Inc
•
Filing: 1955-08-01
•
Granted: 1960-11-22
•
Expires: 1975-08-01
Abstract
No abstract record available.
Inventors
- 👤 Taylor G Bergey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:12
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/06; E21B21/063; E21B21/065; Y; Y10; Y10T; Y10T74/00; Y10T74/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1091449A
Cited
US1182347A
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US1171632A
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US1401740A
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US1507413A
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US1529199A
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US1490899A
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US2052481A
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US1921296A
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GB428188A
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US2112371A
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US2186704A
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US2210759A
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US2461764A
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US2466988A
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US2682488A
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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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |