US PATENT SUBCLASS 175 / 4.57
.~ Projectile forms bore

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

2  DF  BORING WITH EXPLOSION IN INACCESSIBLE HOLE {12}
4.57.~ Projectile forms bore {2}
4.58  DF  .~.~> With means to initially restrain projectile for pressure build-up
4.59  DF  .~.~> With means to prevent preliminary bore fluid contact

DEFINITION

Classification: 175/4.57

(under subclass 2) Subject matter comprising an apparatus or process for firing a missile.

(1) Note. A mere missile or projectile, per se, is not classified under this definition. It is classified in the appropriate ordnance class if the disclosure is not limited to earth boring and no specific earth boring feature is claimed. However, if the disclosure is limited to earth boring or a specific earth boring feature is claimed, classification is in the appropriate subclass herebelow in Class 175.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3.5, for subject matter directed to a projectile which carries an explosive charge.