Method and apparatus for underground deposit detection in water covered areas
Patent 3987677 Issued on October 26, 1976. Estimated Expiration Date: 
October 26, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 26, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2266556 2918579 3455144 3561546 3681028 3714811 3722271 3862572 InventorAssigneeApplicationNo. 653991 filed on 01/30/1976US Classes:73/19.03, By vibration436/29, For petroleum oils or carbonaceous minerals73/432.1, MISCELLANEOUS73/863.21, With constituent separation73/864.51, Receptacle type73/864.52PreevacuatedExaminersPrimary: Swisher, S. ClementAttorney, Agent or FirmAbstractA plurality of gas sample collecting containers are distributed in a predetermined pattern from a vehicle. The containers are cup shaped but weighted so that the open end sinks first and engages the subaqueous earth laer. Gas migrating upwardly through the earth is caught by the inverted cup. The gas sample may be either collected in a separate container or exposed to a detector material located above the expected water level. The sample collecting containers may be retrieved by means of marker floats, magnetic grappling devices or self actuated flotation devices. |
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