US PATENT SUBCLASS 96 / 13
.~.~.~ Ring containing organic compound

Current as of: June, 1999
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96 /   HD   GAS SEPARATION: APPARATUS

4  DD  APPARATUS FOR SELECTIVE DIFFUSION OF GASES (E.G., SEMIPERMEABLE MEMBRANE, ETC.) {6}
11  DF  .~ Plural layers (e.g., laminated barrier, etc.) {1}
12  DF  .~.~ Organic compound containing layer {1}
13.~.~.~ Ring containing organic compound

DEFINITION

Classification: 96/13

Ring containing organic compound:

(under subclass 12) Apparatus in which at least one of the distinguishable layers contains an organic compound that is cyclic.

SEE OR SEARCH THIS CLASS, SUBCLASS:

14, for gas diffusion membranes composed of a single layer and having at least one ring containing organic compound.

SEE OR SEARCH CLASS

210, Liquid Purification or Separation,

500.28+, for semipermeable membranes containing a cyclic organic compound which are used for purifying or separating liquids.