US PATENT SUBCLASS 210 / 616
.~.~.~ Particulate media

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


210 /   HD   LIQUID PURIFICATION OR SEPARATION

600  DF  PROCESSES {14}
601  DF  .~ Treatment by living organism {13}
615  DF  .~.~ Utilizing contact surfaces supporting microorganism (e.g., trickling filter, etc.) {2}
616.~.~.~ Particulate media {1}
617  DF  .~.~.~.~> In bed form {1}

DEFINITION

Classification: 210/616

Particulate media:

(under subclass 615) Process wherein the contact surfaces are granular, or comprise a mass of small particles, e.g., sand, powder, etc.