US PATENT SUBCLASS 210 / 635
.~.~ Liquid/liquid or gel type (i.e., jellylike) chromatography

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}
635.~.~ Liquid/liquid or gel type (i.e., jellylike) chromatography

DEFINITION

Classification: 210/635

Liquid/liquid or gel type (i.e., jelly like) chromatography:

(under subclass 634) Process in which the extracting liquid is relatively immobile and an equilibrium of the dissolution or suspension of a constituent between the two liquids is set up such that the constituent moves through the extracting liquid at a slower rate than the movement of the treated liquid and said constituent tends to concentrate in a specific volume of the extracting liquid.

(1) Note. See subclasses 656+ for chromatography using a solid sorbent and note the distinction between gel-type chromatography of this subclass and chromatography using a solid, e.g., silica gel found in subclasses 656+. For the purpose of this subclass, gel type includes only those suspensions which have a liquid or jellylike texture or property and does not include material of a solid character as silica gel. The gel or liquid stationary phase may be (and generally is) associated with a solid which tends to immobilize it, usually being coated on small particles of such a solid to increase surface area.