.~ Removing formation impurities from artifical fiber
DEFINITION
Classification: 8/137.5
(under subclass 137) Processes directed to the cleaning or purification of artificial fibers to remove impurities resulting from or incidental to the extrusion or shaping operation, such as, for example, carbon bisulphide or sulfur from viscose yarn.
(1) Note. The subclass includes, for example, combined processes of forming and purifying extruded fibers where the spinning operation is not significantly claimed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
151+, and 155+, for manipulative processes wherein the purification step is only broadly stated.
