US PATENT SUBCLASS 502 / 527.13
.~ More than two overlapping layers

Current as of: June, 1999
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502 /   HD   CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING

527.12  DF  PLURAL LAYERS ON A SUPPORT, EACH LAYER HAVING A DISTINCT FUNCTION {1}
527.13.~ More than two overlapping layers

DEFINITION

Classification: 502/527.13

More than two overlapping layers:

(under subclass 527.12) Collection of art wherein at least three overlapping layers are present on the support.