US PATENT SUBCLASS 285 / FOR 122
.~.~ Suspended (e.g., oil well casing type) (285/140)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


285 /   HD   PIPE JOINTS OR COUPLINGS

FOR 100  DF  SYSTEMS (285/120) {11}
FOR 120  DF  .~ Inner to spaced outer tube coupling (285/138) {2}
FOR 122.~.~ Suspended (e.g., oil well casing type) (285/140) {3}
FOR 123  DF  .~.~.~> Radially movable support ring (split ring type) (285/141)
FOR 124  DF  .~.~.~> Inner tube coupling with integral support (285/142) {1}
FOR 126  DF  .~.~.~> Slip anchored inner tube (285/144) {4}

DEFINITION

Classification: 285/FOR.122

Foreign art collection in which the tubes are in a substantially vertical position and comprising means to hang the inner within the outer tube, e.g., well caps or headers.