Patent US2884534A successfully refreshed from Google Patents.
US2884534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well logging by selective detection of neutrons
Assignee: Well Surveys Inc
•
Filing: 1954-04-19
•
Granted: 1959-04-28
•
Expires: 1974-04-19
Abstract
No abstract record available.
Inventors
- 👤 Robert E Fearon
- 👤 Jean M Thayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:52
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/107
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
A METHOD OF IDENTIFYING PETROLEUM THAT EXISTS IN CERTAIN OF THE UNDERGROUND FORMATIONS PENETRATED BY A WELL THAT COMPRISES IRRADIATING THE FORMATIONS WITH A FLUX OF FAST NEUTRONS, SIMULTANEOUSLY MEASURING THE RELATIVE NUMBER OF FAST NEUTRONS RETURNING TO THE WELL AS INDICATIVE OF THE RELATIVE PRESENCE OF HYDROGEN, SIMULTANEOUSLY MEASURING THE RELATIVE NUMBER OF FAST NEUTRONS RETURNING TO THE WELL WHICH HAVE SUFFERED A SPECIFIC ENERGY LOSS CHARACTERISTIC OF CARBON AS INDICATIVE OF THE RELATIVE PRESENCE OF CARBON, SIMULTANEOUSLY MEASURING THE RELATIVE NUMBER OF FAST NEUTRONS RETURNING TO THE WELL WHICH HAVE SUFFERED
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) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |