Patent US3079549A successfully refreshed from Google Patents.
US3079549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and techniques for logging well bores
Assignee: Individual
•
Filing: 1957-07-05
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Granted: 1963-02-26
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Expires: 1977-07-05
Abstract
No abstract record available.
Inventors
- 👤 Philip W Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/26; E; E21; E21B; E21B47/00; E21B47/12; E21B47/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
IN A SYSTEM OF THE CHARACTER DESCRIBED FOR INDICATING THE SPONTANEOUS POTENTIAL OF A FORMATION ENGAGED BY A DRILL STRING, SAID DRILL STRING COMPRISING AN ELEMENT OF A SINGLE ELECTRICAL TURN THROUGH WHICH CURRENT FLOWS
Claim 2
Dependent Claim
35 words
IN A SYSTEM OF THE CHARACTER DESCRIBED FOR INDICATING THE SPONTANEOUS POTENTIAL OF A FORMATION ENGAGED BY A DRILL STRING, SAID DRILL STRING COMPRISING AN ELEMENT OF A SINGLE ELECTRICAL TURN THROUGH WHICH CURRENT FLOWS
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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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |