The patent instead relates to a semiconductor device fabrication process Apple uses to create chips for its devices. The application describes a canister that can be used to vaporize or sublimate a substance, which in Apple's case would be for delivering substances to a substrate during the deposition or etching process.
The patent's assigned inventor Tetsuya Ishikawa, a senior manager at Apple in the nanotechnology field, lists photolithography as one of his skills on his LinkedIn profile. He also holds several other patents related to semiconductor fabrication. So, in the end, it is pretty safe to say, no, Apple is not working on a vape.