Patent US2730246A successfully refreshed from Google Patents.
Patent US2701620A successfully refreshed from Google Patents.
US2701620A
Expired / Lapsed
US
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Oil, gas, and water separator
Assignee: Individual
•
Filing: 1951-04-30
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Granted: 1955-02-08
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Expires: 1971-04-30
Abstract
No abstract record available.
Inventors
- 👤 Carlos E Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:39
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/34; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3006; Y10T137/3009; Y10T137/3012; Y10T137/3084; Y10T137/309; Y10T137/3099; Y10T137/7287; Y10T137/7313; Y10T137/7316; Y10T137/7319; Y10T137/7358; Y10T137/7365; Y10T137/7413; Y10T137/7439; Y10T137/7491
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1946229A
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US2016642A
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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) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |