US PATENT SUBCLASS 411 / 61
.~.~.~ Folded blank type

Current as of: June, 1999
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411 /   HD   EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER

15  DF  HAVING SEPARATE EXPANDER MEANS {13}
44  DF  .~ Including sleeve and distinct tapered expander (e.g., anchor bolt type) {9}
57.1  DD  .~.~ Slotted sleeve spread by tapered expander {5}
61.~.~.~ Folded blank type

DEFINITION

Classification: 411/61

Folded blank type:

(under subclass 57.1) Subject matter wherein the sleeve is formed from a single sheet of material bent into shape with free edges of the sheet defining the sides of the elongated narrow aperture.