(under subclass 250.01) A process in which some identifiable property of a portion of a formation is ascertained.
(1) Note. The position determining steps must be explicitly recited in a claim for classification in this subclass and not left to inference. The position of a portion of the earth is almost always determined at some stage in processes involving wells.
(2) Note. Included in this subclass are a natural property which exists before any alteration by man and locating a radioactive marker inserted in a formation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
253.1, for a process of determining location or absence of cement which may use radioactive markers.
SEE OR SEARCH CLASS
73, Measuring and Testing,
152.02+, for a well logging wherein the well process is used only to perfect a test. 175, Boring or Penetrating the Earth,
40+, especially subclass 50 for a process of earth boring including indicating, testing or measuring a condition of the formation.
