US2974303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical systems for borehole apparatus
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1957-02-08
•
Granted: 1961-03-07
•
Expires: 1977-02-08
Abstract
No abstract record available.
Inventors
- 👤 Dwight R Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:44
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; E; E21; E21B; E21B47/00; E21B47/12; G01V3/00; G01V3/18; G01V3/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2412575A
Cited
US2379996A
Cited
US2554844A
Cited
US2573137A
Cited
US2752508A
Cited
US2816235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |