US2704347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodes for electrical well logging
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1951-12-06
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Granted: 1955-03-15
•
Expires: 1971-12-06
Abstract
No abstract record available.
Inventors
- 👤 Doll Henri-Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:01
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32467; Y10T403/32516
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US814529A
Cited
US1415251A
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US1999414A
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US2281766A
Cited
US2297828A
Cited
US2346728A
Cited
US2537481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |