US2539355A
Expired / Lapsed
US
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Apparatus for measuring interstitial water content, permeability, and electrical conductivity of well cores
Assignee: ExxonMobil Oil Corp
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Filing: 1947-08-06
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Granted: 1951-01-23
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Expires: 1967-08-06
Abstract
No abstract record available.
Inventors
- 👤 Paul P Reichertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:47
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/24; G01N33/246; G01N15/00; G01N15/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |