US3465448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining depth in boreholes
Assignee: Schlumberger Technology Corp
•
Filing: 1966-01-03
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Granted: 1969-09-09
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Expires: 1986-01-03
Abstract
No abstract record available.
Inventors
- 👤 William A Whitfill Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:58
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44; E; E21; E21B; E21B47/00; E21B47/04; G06; G06G; G06G7/00; G06G7/48; Y; Y10; Y10S; Y10S56/00; Y10S56/15
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) | 1972-09-08 | 1973-03-10 | 1973-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-08 | 1977-03-10 | 1977-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-08 | 1981-03-10 | 1981-09-09 | $7700.00 | Window Closed / Lapsed |