US3412815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic radiation method for guiding the drilling of oil wells after the borehole has entered a massive earth formation of chemically deposited material, by a mistake, accident, or the like
Assignee: Chevron USA Inc
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Filing: 1966-11-14
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Granted: 1968-11-26
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Expires: 1986-11-14
Abstract
No abstract record available.
Inventors
- 👤 William T Holser
- 👤 Robert R Unterberger
- 👤 Stanley B Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:19
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/10; E21B47/00; E21B47/02; E21B47/022; E21B47/0228; G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/34; G01S13/345; G01V; G01V3/00; G01V3/18; G01V3/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3286163A
Cited
US3350634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |