US3200251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for neutron-neutron well logging
Assignee: Well Surveys Inc
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Filing: 1961-07-07
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Granted: 1965-08-10
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Expires: 1981-07-07
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Youmans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:09
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
APPARATUS FOR INVESTIGATING SUBSURFACE SUBSTANCES SURROUNDING A BOREHOLE, SAID APPARATUS COMPRISING A SOURCE OF FAST NEUTRONS SUSPENDED IN SAID BOREHOLE, DETECTING MEANS RESPONSIVELY PRODUCING ELECTRICAL SIGNALS FUNCTIONALLY RELATED TO INCIDENT THERMAL NEUTRONS AND SPACED A PRE-SELECTED DISTANCE IN SAID BOREHOLE FROM SAID SOURCE, MEANS FOR SELECTIVELY EXPOSING SAID DETECTING MEANS PREFERENTIALLY TO NEUTRONS THERMALIZED IN SAID SURROUNDING SUBSTANCES AND PREFERENTIALLY TO NEUTRONS THERMALIZED IN SUBSTANCES WITHIN SAID BOREHOLE, AND MEANS FOR COMPARATIVELY RECORDING SAID SIGNALS CORELATIVELY WITH AN INDICATION OF
Claim 2
Dependent Claim
80 words
APPARATUS FOR INVESTIGATING SUBSURFACE SUBSTANCES SURROUNDING A BOREHOLE, SAID APPARATUS COMPRISING A SOURCE OF FAST NEUTRONS SUSPENDED IN SAID BOREHOLE, DETECTING MEANS RESPONSIVELY PRODUCING ELECTRICAL SIGNALS FUNCTIONALLY RELATED TO INCIDENT THERMAL NEUTRONS AND SPACED A PRE-SELECTED DISTANCE IN SAID BOREHOLE FROM SAID SOURCE, MEANS FOR SELECTIVELY EXPOSING SAID DETECTING MEANS PREFERENTIALLY TO NEUTRONS THERMALIZED IN SAID SURROUNDING SUBSTANCES AND PREFERENTIALLY TO NEUTRONS THERMALIZED IN SUBSTANCES WITHIN SAID BOREHOLE, AND MEANS FOR COMPARATIVELY RECORDING SAID SIGNALS CORELATIVELY WITH AN INDICATION OF
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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |