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Patent US2357189A successfully refreshed from Google Patents.
US2357189A
Expired / Lapsed
US
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Flow regulation apparatus for brine injection wells
Assignee: Salt Water Control Inc
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Filing: 1942-06-08
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Granted: 1944-08-29
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Expires: 1962-06-08
Abstract
No abstract record available.
Inventors
- 👤 Ransome W Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:04
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/8593; Y10T137/87265; Y10T137/8733
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-08-29 | 1948-02-28 | 1948-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-08-29 | 1952-02-28 | 1952-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-08-29 | 1956-02-28 | 1956-08-29 | $7700.00 | Window Closed / Lapsed |