US PATENT SUBCLASS 264 / 171.27
.~.~.~ Having three or more layers of at least two different materials

Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

165  DF  FORMING CONTINUOUS OR INDEFINITE LENGTH WORK {8}
171.1  DF  .~ Layered, stratified traversely of length, or multiphase macrostructure containing material (e.g., conjugate, composite, islands-in-sea, core-sheath, etc.) {8}
171.26  DF  .~.~ Producing hollow composite {4}
171.27.~.~.~ Having three or more layers of at least two different materials

DEFINITION

Classification: 264/171.27

Having three or more layers of at least two different materials:

(under subclass 171.26) Processes directed to a hollow composite which has more than two layers wherein the material

comprising at least one of the layers is dissimilar.