US2726338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of locating material
Assignee: Schlumberger Well Surveying Corp
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Filing: 1951-10-18
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Granted: 1955-12-06
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Expires: 1971-10-18
Abstract
No abstract record available.
Inventors
- 👤 Goodman Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:53
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
A METHOD OF LOCATING A PARTICULAR MATERIAL IN A MASS OF ASSOCIATED MATERIAL COMPRISING INCORPORATING BERYLLIUM NEUCLEI WITH THE PARTICULAR MATERIAL, IRRADIATING THE MASS OF MATERIAL WITH GAMMA RAYS HAVING AN ENERGY LEVEL IN EXCESS OF ABOUT 1.66 MILLION ELECTRON VOLTS TO PHOTODISTINTEGRATE A BERYLLIUM NUCLEUS AND RELEASE A PHOTONEUTRON THEREFROM BUT OF INSUFFICIENT STRENGTH TO PHOTODISTINTEGRATE NUCLEI OF ELEMENTS REQUIRING GREATER THRESHOLD ENERGY TO RELEASE A NEUTRON THEREFROM, AND CONVERTING THE PHOTONEUTRONS RECEIVED FROM THE IRRADIATED MASS OF MATERIAL TO A SENSIBLE INDICATION OF THE PRESENCE OF THE PARTICULAR MATERIAL.
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) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |