Patent US1732222A successfully refreshed from Google Patents.
US1732222A
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Method of and apparatus for separating ground water from petroleum
Assignee: EMPIRE OIL AND REFINING Co
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Filing: 1924-04-02
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Granted: 1929-10-22
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Expires: 1944-04-02
Abstract
No abstract record available.
Inventors
- 👤 Cantrall Elmer Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:56
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0214; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7313; Y10T137/7323; Y10T137/7326; Y10T137/7358; Y10T137/742; Y10T137/7423; Y10T137/7426; Y10T137/7436
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) | 1932-10-21 | 1933-04-22 | 1933-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-10-21 | 1937-04-22 | 1937-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-10-21 | 1941-04-22 | 1941-10-22 | $7700.00 | Window Closed / Lapsed |