Opinion ID: 3166799
Heading Depth: 3
Heading Rank: 3

Heading: Pauley

Text: Great Britain Patent No. 640,266 (“Pauley”) (J.A. 1010–15) describes an apparatus for generating an opaque fog, for use in theatrical work, that is “sufficiently heavy in weight by comparison with the surrounding air,” Pauley p. 2 ll. 20–22, such that the fog can “‘lay’ conveniently without quickly melting or drifting away,” id. p. 2 ll. 51–52. Figure 1 of Pauley is depicted below. Id. fig.1. REDLINE DETECTION, LLC v. STAR ENVIROTECH, INC. 7 “[G]lycerine, oil or other suitable liquid is sprayed in atomised form by means of a jet of [CO2 or N2 gas] under pressure on to a surface sufficiently heated as to cause an immediate vaporisation of the liquid.” Id. p. 1 ll. 26–31. This “vapour . . . [is] propelled along . . . [and] cooled again by the expanding gas.” Id. p. 1 ll. 31–34. The cooled liquid condenses to form a heavy fog or mist. Id. p. 2 ll. 37–38. Using inert gas to propel and cool the vaporized liquid is advantageous “because its presence greatly reduces any tendency to ignition of the vapour should the liquid medium be one of an inflammable nature.” Id. p. 2 ll. 42–47.