US3002091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of tracing the flow of liquids by use of post radioactivation of tracer substances
Assignee: Individual
•
Filing: 1958-11-03
•
Granted: 1961-09-26
•
Expires: 1978-11-03
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:54
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; E21B47/11; E21B47/111; G; G21; G21H; G21H5/00; G21H5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR TRACING THE FLOW OF FLUIDS UNDERGROUND WHICH COMPRISES ENRICHING THE FLUID AT ONE UNDERGROUND POINT WITH A TRACER ELEMENT CAPABLE OF YIELDING A RADIOACTIVE ISOTOPE WHEN IRRADIATED WITH NEUTRONS HAVING A FLUX DENSITY OF AT LEAST 10**7 NEUTRONS PER CM.2 PER SECOND, WITHDRAWING A SAMPLE OF THE FLUID AT A SECOND UNDERGROUND POINT, IRRADIATING SAID SAMPLE WITH NEUTRONS HAVING A FLUX DENSITY OF AT LEAST 10**7 NEUTRONS PER CM.2 PER SECOND FOR A PERIOD OF TIME SUFFICIENT TO PRODUCE RADIOACTIVE ISOTOPES FROM SAID TRACER ELEMENT, AND MEASURING THE RESULTING RADIATION.
Claim 2
Dependent Claim
93 words
A PROCESS FOR TRACING THE FLOW OF FLUIDS UNDERGROUND WHICH COMPRISES ENRICHING THE FLUID AT ONE UNDERGROUND POINT WITH A TRACER ELEMENT CAPABLE OF YIELDING A RADIOACTIVE ISOTOPE WHEN IRRADIATED WITH NEUTRONS HAVING A FLUX DENSITY OF AT LEAST 10**7 NEUTRONS PER CM.2 PER SECOND, WITHDRAWING A SAMPLE OF THE FLUID AT A SECOND UNDERGROUND POINT, IRRADIATING SAID SAMPLE WITH NEUTRONS HAVING A FLUX DENSITY OF AT LEAST 10**7 NEUTRONS PER CM.2 PER SECOND FOR A PERIOD OF TIME SUFFICIENT TO PRODUCE RADIOACTIVE ISOTOPES FROM SAID TRACER ELEMENT, AND MEASURING THE RESULTING RADIATION.
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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) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |