US PATENT SUBCLASS 162 / 157.3
.~.~.~ Polyamide, polyester or polyurethane

Current as of: June, 1999
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162 /   HD   PAPER MAKING AND FIBER LIBERATION

100  DF  PROCESSES AND PRODUCTS {31}
157.1  DF  .~ Synthetic fiber (including chemically modified cellulose) {2}
157.2  DF  .~.~ Synthetic resin {2}
157.3.~.~.~ Polyamide, polyester or polyurethane

DEFINITION

Classification: 162/157.3

Polyamide, polyester or polyurethane:

(under subclass 157.2) Processes and products in which the fibers consist of synthetic resin containing recurring amides, ester or carbonic acid half amides, half ester, i.e., urethane groups in the main polymer chain.