Patent ID: 8153434

Claim:
A fluid storage and dispensing apparatus comprising a fluid storage and dispensing vessel adapted to hold a fluid for dispensing at low pressure, said vessel including a neck portion and a valve head assembly attached to said vessel at said neck portion, wherein said vessel in an interior volume thereof contains (i) a solid-phase physical adsorbent material having sorptive affinity for said fluid or (ii) a pressure regulator assembly arranged for said dispensing at low pressure, said vessel further comprising a clear or translucent shroud that is circumferentially sealed to an exterior surface of the vessel, overlying the neck portion of the vessel and the valve head assembly to define an interior volume enclosed by the shroud, wherein the enclosed interior volume surrounds the neck portion and valve head assembly, and a colorimetric material in the enclosed interior volume that is colorimetrically sensitive to fluid held in the vessel for dispensing, whereby leakage of said fluid at said neck portion and/or valve head assembly is confined by the enclosed interior volume and effects a color change in the colorimetric material that is visually perceptible through the shroud upon occurrence of a leakage event.