Patent ID: 8800218

Claim:
An insulating construction panel having a top end, a bottom end, a first end, a second end, a front side and a rear side, the panel for constructing a single or multi-cavity concrete form, the panel comprising: regularly spaced coplanar passages extending completely through the panel from the top end of the panel toward and through to the bottom end of the panel; for each of the regularly spaced coplanar passages, an angular passage perpendicularly intersecting each coplanar passage at the top end and extending toward and through a portion of the front side and the rear side of the panel, each angular passage extending only partially through the panel from the top end toward the bottom end; and for each of the regularly spaced coplanar passages, an angular passage perpendicularly intersecting each coplanar passage at the bottom end and extending toward and through a portion of the front side and the rear side of the panel, each angular passage extending only partially through the panel from the bottom end toward the top end.