Patent ID: 7124913

Claim:
A transportable container for high purity, high cost, liquid chemical to maximize dispensing of the liquid chemical content of the container at deviations from an upright position without dispensing all of the liquid chemical, comprising; a shell comprising a top wall, a side wall and a bottom wall, the bottom wall having an internal surface contacting liquid chemical with a smooth concave upward quadric contour having a lowest most point axially central to the container and forms a smooth curved surface with an internal surface of the side wall, a first orifice being used as an inlet, a second orifice being used as an outlet comprising a diptube through which the liquid chemical is dispensed from said container with an outlet end adjacent the top surface and an inlet terminal end adjacent the lowest most point, a level sensor assembly signaling at least one level of the liquid chemical in the container having an output end adjacent the top surface and a terminal end containing a lowest most level sensing sensor adjacent the lowest most point, wherein said level sensor assembly is selected from the group consisting of an ultrasonic level sensor assembly, a capacitance level sensor assembly, an optical level sensor assembly and a float level sensor assembly; the diptube and the level sensor assembly being more proximate to one another at their terminal ends than their ends adjacent the top surface.