Patent US2314540A successfully refreshed from Google Patents.
US2314540A
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Apparatus for measuring volume of bottom hole portion of well bores
Assignee: Phillips Petroleum Co
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Filing: 1941-12-30
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Granted: 1943-03-23
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Expires: 1961-12-30
Abstract
No abstract record available.
Inventors
- 👤 Richard L Huntington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:53
CPC Classifications
E; E02; E02D; E02D1/00; E02D1/02; E21; E21B; E21B47/00; E21B47/003; G; G01; G01F; G01F17/00
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) | 1946-03-22 | 1946-09-21 | 1947-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-03-22 | 1950-09-21 | 1951-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-03-22 | 1954-09-21 | 1955-03-23 | $7700.00 | Window Closed / Lapsed |