I got two bottles of caffeinated 0nic juice from Bootleg Vapors today. I'll need to steep it before trying it. They will not blend both caffeine and nic in the same juice. I do not know if it is safe. As for patents, I don't know how someone can patent dissolving Caffeine USP powder into their PG base. They don't tell me how much caffeine is in there (I did not ask), but some other vendors claim 200mg Caffeine per 10ml juice. That concentration level seems so low to me. I consume 50mg Caffeine per hour given my regular coffee breaks, so I'm neither expecting good things nor bad things from vaping this.