US PATENT SUBCLASS 138 / 144
.~.~ Spirally wound layer

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

Internet Version by PATENTEC © 1999      Terms of Use


138 /   HD   PIPES AND TUBULAR CONDUITS

140  DF  DISTINCT LAYERS {8}
141  DF  .~ Bonded to each other {3}
144.~.~ Spirally wound layer

DEFINITION

Classification: 138/144

(under subclass 141) Device wherein at least one layer is spirally wound.

SEE OR SEARCH CLASS

156, Adhesive Bonding and Miscellaneous Chemical Manufacture,

169+, 184+ and 425+ for processes and apparatus for forming tubes, etc., by a winding operation in combination with a laminating step.