US PATENT SUBCLASS 29 / 896.61
.~.~ Coil wound wall screen

Current as of: June, 1999
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29 /   HD   METAL WORKING

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
896.6  DF  .~ Multiperforated metal article making {2}
896.61.~.~ Coil wound wall screen

DEFINITION

Classification: 29/896.61

Coil wound wall screen:

(under subclass 896.6) Process for making a perforated filtering device which includes a spiral element for performing the filtering.

SEE OR SEARCH THIS CLASS, SUBCLASS:

905, for a cross-reference art collection of methods for making a coil wound wall screen.

SEE OR SEARCH CLASS

166, Wells,

231, for a spiral well screen.

210, Liquid Purification or Separation,

497.1, for a helically wound filter. 242, Winding, Tensioning, or Guiding,

430+, for making a composite hollow object by an operation of

that class.