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US3515871A
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Radioactive borehole logging method and apparatus whereby elements of interest are determined by generating gamma rays having a predetermined critical energy such that they are resonantly scattered by said elements
Assignee: Atlantic Richfield Co
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Filing: 1966-12-21
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Granted: 1970-06-02
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Expires: 1986-12-21
Abstract
No abstract record available.
Inventors
- 👤 Walter H Johnson Jr
- 👤 William C Pritchett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:32
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/14; G01V5/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2206634A
Cited
US2491320A
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US2769915A
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US2967937A
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US3094622A
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US3378097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |