Patent FR350214A successfully refreshed from Google Patents.
US3098198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for electrically logging earth formations by sensing the redox potential arising in a mud filled borehole
Assignee: Individual
•
Filing: 1959-03-16
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Granted: 1963-07-16
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Expires: 1979-03-16
Abstract
No abstract record available.
Inventors
- 👤 Salimbeni Gherardo Bartolini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:30
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/26; G01V3/265
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
A METHOD OF LOCATING SUB-SURFACE FORMATIONS CONTAINING OXIDIZABLE OR REDUCIBLE MINERALS ALONG A BOREHOLE FILLED WITH A WATER BASE MUD OR LIQUOR WHICH DOES NOT CONTAIN ORGANIC REDUCING SUBSTANCES, COMPRISING THE STEPS OF ADDING TO THE MUD A REAGENT WHICH IS CAPABLE TO REACTING WITH AT LEAST SOME OF THE MATERIALS OF THE FORMATIONS SURROUNDING THE BOREHOLE AND CHANGING THE ELECTROLYTICAL CHARACTERISTICS OF THE MUD IN CORRESPONDENCE WITH SAID FORMATIONS, RUNNING INTO THE BOREHOLE AT LEAST
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |