Don't think it was promised as a letter as much as that they'd release a PR when the made their filings from then on. The PR was release yesterday. Here's the link:

http://patriotscientific.com/index.p...

Based on the recent shareholder letters, it seems likely that we'll either get a letter this month - Aug 21 would be one month from last letter, OR after the Crossflo deal is finalized and he can report the specifics on that. I'd bet we hear something before then, but I also bet the Steelers would win the last 3 Superbowls. Well....1 outta 3 ain't bad. lol