US PATENT SUBCLASS 285 / 123.12
.~.~.~ Including a seal


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

120.1  DF  HAVING PLURAL INDEPENDENT PATHS {4}
123.1  DF  .~ For concentric tubes or pipes (e.g., well casing or wellhead type) {4}
123.3  DF  .~.~ Having single suspended inner tube {3}
123.12.~.~.~ Including a seal {2}
123.13  DF  .~.~.~.~> Held by a means applied radially (e.g., set crew)
123.14  DF  .~.~.~.~> Compressed by tightening a bolt coaxial to tubing


DEFINITION

Classification: 285/123.12

Including a seal:

(under subclass 123.3) Subject matter including a packer or pack-off type device that prevents or minimizes the flow of a fluid.