US PATENT SUBCLASS 210 / 646
.~.~.~.~ Hemodialysis

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

600  DF  PROCESSES {14}
634  DF  .~ Liquid/liquid solvent or colloidal extraction or diffusing or passing through septum selective as to material of a component of liquid; such diffusing or passing being effected by other than only an ion exchange or sorption process {11}
644  DF  .~.~ Diffusing or passing through septum selective as to material of a component in liquid/liquid solvent or colloidal extraction {2}
645  DF  .~.~.~ Biological fluid (e.g., blood, urine, etc.) {1}
646.~.~.~.~ Hemodialysis {1}
647  DF  .~.~.~.~.~> Maintaining critical concentration(s)

DEFINITION

Classification: 210/646

Hemodialysis:

(under subclass 645) Process in which blood is treated or purified.

(1) Note. The process generally duplicates the function of the kidney.

SEE OR SEARCH CLASS

128, Surgery, for a method of treating blood and a

significant step of withdrawing from or returning to a living body the blood being treated.

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,

44+, for blood oxygenating apparatus; however, combined blood purifying and oxygenating apparatus is in this class (210).

435, Chemistry: Molecular Biology and Microbiology, 2, for a process of oxygenating blood, but the combined process of purifying and oxygenating blood is classifiable in this class (210).