There used to be a thing called a Statutory Invention Registration (SIR) which was pretty much what you're describing. It was repealed in 2013, however. I belie

There used to be a thing called a Statutory Invention Registration (SIR) which was pretty much what you're describing. It was repealed in 2013, however. I believe the thinking was that simply publishing on the internet was sufficient enough to achieve the same purpose. If you want to make something available as prior art, make sure it is widely available, indexable, and accessible. You could also file a patent and let it lapse after the PgPub publishes, so for the cost of the basic filing fee you can put whatever you want into the official US Patent database. For a micro entity, that's only $75.