US PATENT SUBCLASS 73 / 152.07
.~.~.~ By a core sample analysis

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

152.01  DF  BOREHOLE OR DRILLING (E.G., DRILL LOADING FACTOR, DRILLING RATE, RATE OF FLUID FLOW) {6}
152.02  DF  .~ Formation logging (e.g., borehole studies of pressure derivatives or of pressure-temperature derivatives) {8}
152.05  DF  .~.~ Density, porosity, or permeability {2}
152.07.~.~.~ By a core sample analysis

DEFINITION

Classification: 73/152.07

By a core sample analysis:

(under subclass 152.05) Subject matter including a sample in the form of an undisturbed portion removed from the formation and wherein the determination of the physical characteristic of the borehole is made by analysis of the portion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

152.09, for formation logging by measuring an oil, gas, or water saturation of a core sample.

152.11, for formation logging by measuring a property of a core sample.

864.44+, for sampling, per se, by use of a corer.

866, for the testing of solid material, per se.

SEE OR SEARCH CLASS

175, Boring or Penetrating the Earth, 58, for a process of obtaining a core sample from a borehole formation and subclass 403+ and the notes there noted for a bit for cutting an earth core.

324, Electricity: Measuring and Testing,

376+, for a purely electrical measurement of a property of a subsurface core sample.