US PATENT SUBCLASS 285 / 287.1
.~ With root repellent
Current as of: June, 1999
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DEFINITION
Classification: 285/287.1
With root repellent:
(under subclass 285.1) Subject matter including means to inhibit or resist the growth of vegetative roots between the members.
SEE OR SEARCH THIS CLASS, SUBCLASS:
45+, for a coupling with a casing, lining or protector.
SEE OR SEARCH CLASS
138, Pipes and Tubular Conduits,
90, for similar structure in test plug combinations.
215, Bottles and Jars,
52+, for expansible stopper type closures. 220, Receptacles,
233, for an expansible plug closure.