US PATENT SUBCLASS 15 / 3.51
.~.~ With conservation or recovery of the cleaning agent

Current as of: June, 1999
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15 /   HD   BRUSHING, SCRUBBING, AND GENERAL CLEANING

3  DF  MACHINES {11}
3.5  DF  .~ With means to pass a solid cleaning agent and a fluid carrier through tubular work {1}
3.51.~.~ With conservation or recovery of the cleaning agent {1}
3.52  DF  .~.~.~> By attached line

DEFINITION

Classification: 15/3.51

(under subclass 3.5) Machines which include an arrangement whereby the cleaning instrumentality is retained or is recovered at the end of the cleaning operation, either for subsequent disposal or for reuse.