Patent SE429020B successfully refreshed from Google Patents.
Patent US3291997A successfully refreshed from Google Patents.
US3291997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for tracing fluid flow through porous media
Assignee: Individual
•
Filing: 1963-11-13
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Granted: 1966-12-13
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Expires: 1983-11-13
Abstract
No abstract record available.
Inventors
- 👤 Edward L Albenesius
- 👤 Clyde C Haskell
- 👤 Richard H Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:14
CPC Classifications
G; G21; G21H; G21H5/00; G21H5/02; E; E21; E21B; E21B47/00; E21B47/10; E21B47/11; E21B47/111
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A METHOD OF TRACING FLUID FLOW IN SOIL COMPRISING DRILLING A PLURALITY OF SUBSTANTIALLY EQUALLY SPACED HOLES IN A CIRCULAR ARRAY TO A PREDETERMINED DEPTH ABOVE THE WATER TABLE IN THE SOIL, DRILLING AN ACCESS HOLE IN THE APPROXIMATE CENTER OF SAID PLURALITY OF HOLES AND TO A GREATER DEPTH, DEPOSITING IN EACH OF SAID PLURALITY OF HOLES A QUANTITY OF D2O, PLACING A PROBE COMPRISING AN INTEGRAL GAMMA RDIATION SOURCES AND NEUTRON DETECTOR IN SAID ACCESS HOLE, SAID GAMMA RADIATION HAVING AN ENERGY GREATER THAN THE THRESHOLD VALUE FOR THE (Y,N) REACTION WITH DEUTERIUM, MOVING THE PROBE IN THE VICINITY OF AND RELATIVE TO THE DEPTH OF SAID PLURALITY OF HOLES, AND MEASURING THE NEUTRONS PRODUCED BY THE (Y,N) REACTION WITH SAID DETECTOR AT VARIOUS POSITINS OF SAID PROBE OVER A PERIOD OF TIME.
Claim 2
Independent Claim
135 words
A METHOD OF TRACING FLUID FLOW IN SOIL COMPRISING DRILLING A PLURALITY OF SUBSTANTIALLY EQUALLY SPACED HOLES IN A CIRCULAR ARRAY TO A PREDETERMINED DEPTH ABOVE THE WATER TABLE IN THE SOIL, DRILLING AN ACCESS HOLE IN THE APPROXIMATE CENTER OF SAID PLURALITY OF HOLES AND TO A GREATER DEPTH, DEPOSITING IN EACH OF SAID PLURALITY OF HOLES A QUANTITY OF D2O, PLACING A PROBE COMPRISING AN INTEGRAL GAMMA RDIATION SOURCES AND NEUTRON DETECTOR IN SAID ACCESS HOLE, SAID GAMMA RADIATION HAVING AN ENERGY GREATER THAN THE THRESHOLD VALUE FOR THE (Y,N) REACTION WITH DEUTERIUM, MOVING THE PROBE IN THE VICINITY OF AND RELATIVE TO THE DEPTH OF SAID PLURALITY OF HOLES, AND MEASURING THE NEUTRONS PRODUCED BY THE (Y,N) REACTION WITH SAID DETECTOR AT VARIOUS POSITINS OF SAID PROBE OVER A PERIOD OF TIME.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |