US3070696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioactive solid particles for use in well logging
Assignee: Union Oil Company of California
•
Filing: 1955-09-19
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Granted: 1962-12-25
•
Expires: 1975-09-19
Abstract
No abstract record available.
Inventors
- 👤 Cassius R Mcewen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:14
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G21; G21G; G21G4/00; G21G4/04; G21G4/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE METHOD OF LOGGING BOREHOLES WHICH COMPRISES INTRODUCING INTO THE BORE A FLUID HAVING SUSPENDED THEREIN A FINELY-DIVIDED SYNTHETIC RESIN SELECTED FROM THE CLASS CONSISTING OF POLYETHYLENE AND NON-ION-EXCHANGING POLYVINYL RESINS, SAID SYNTHETIC RESIN HAVING PREVIOUSLY BEEN RENDERED RADIOACTIVE BY TREATMENT WITH A RADIOACTIVE HALOGEN IN ELEMENTAL FORM, APPLYING SUFFICIENT PRESSURE TO FORCE SAID FLUID INTO THE STRATA TRAVERSED BY THE BORE, WHEREBY SAID SOLIDS ARE DEPOSITED ON THE WALLS OF THE BORE, AND THEREAFTER DETERMINING VARIATIONS IN THE INTENSITY OF RADIATION FROM SAID DEPOSITED SOLIDS WITH RESPECT TO THE DEPTH THEREOF.
Claim 2
Independent Claim
92 words
THE METHOD OF LOGGING BOREHOLES WHICH COMPRISES INTRODUCING INTO THE BORE A FLUID HAVING SUSPENDED THEREIN A FINELY-DIVIDED SYNTHETIC RESIN SELECTED FROM THE CLASS CONSISTING OF POLYETHYLENE AND NON-ION-EXCHANGING POLYVINYL RESINS, SAID SYNTHETIC RESIN HAVING PREVIOUSLY BEEN RENDERED RADIOACTIVE BY TREATMENT WITH A RADIOACTIVE HALOGEN IN ELEMENTAL FORM, APPLYING SUFFICIENT PRESSURE TO FORCE SAID FLUID INTO THE STRATA TRAVERSED BY THE BORE, WHEREBY SAID SOLIDS ARE DEPOSITED ON THE WALLS OF THE BORE, AND THEREAFTER DETERMINING VARIATIONS IN THE INTENSITY OF RADIATION FROM SAID DEPOSITED SOLIDS WITH RESPECT TO THE DEPTH THEREOF.
References Cited (Backward Citations)
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US2462241A
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US2503252A
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US2540049A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |