Patent US2903015A successfully refreshed from Google Patents.
US2903015A
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Selective sediment discharge valve for an emulsion treater
Assignee: Salt Water Control Inc
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Filing: 1957-02-19
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Granted: 1959-09-08
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Expires: 1977-02-19
Abstract
No abstract record available.
Inventors
- 👤 Ransome W Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:50
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/40; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3006; Y10T137/794; Y10T137/8013; Y10T137/8593; Y10T137/87096; Y10T137/877
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US597954A
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US2731802A
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US2768639A
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US2786643A
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US766420A
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US2510252A
Cited
US2548333A
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US2781780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |