US2620043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating emulsion emanating from natural oil wells
Assignee: FORREST LEE MURDOCK SR
•
Filing: 1948-08-27
•
Granted: 1952-12-02
•
Expires: 1968-08-27
Abstract
No abstract record available.
Inventors
- 👤 Elmer R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:42
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1901238A
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US2167160A
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US2181687A
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US2384222A
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US2342950A
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US2261101A
Cited
US2457959A
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US2398338A
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US2368497A
Cited
US2474475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |