"Martin
That isn't the intent in the US.
You have to disclose so it can be protected. It is protected so you can make $$$. This encourages innovation and research.
You have it assbackwards"
Not really.
For instance, you might patent a cone-like stove windscreen/support device with a row of air holes at bottom, if you are stupid enough to make your patent that narrow.
I can patent essentially the same device with two roles of air holes if I claim it as an improvement. I can claim it as an improvement, and no one even verifies it either. They take my word for it, I make up some data and its a done deal.
The only thing protected is the *usually* narrow specific claim in the patent, until someone else challenges it. Because I improved it, I am allowed to claim that improvement. That is the reality of how it works. If I want, I can prevent YOU from selling any improved versions of your own invention, without paying ME a royalty, if I try hard enough, and companies do every day. I can own any improvements to YOUR device, even if you own the rights to the basic device.
Since the object of all business is continual improvement of your product, as to not become out-dated, what did disclosing your patent accomplish? Did it protect it, yes, but in a very very narrow sense.
For many things, there are existing examples of prior art too that negate patents when challenged. Especially for simple things like ….maybe having a windscreen that also supports your pot. It does not matter that no one ever SOLD one before, if a picture, or article or something shows that some form of X ever existed, a patent can be ruled invalid. Happens every day.
The truth is, patents offer very little protection unless you have lots of $$$ to defend them. And to do that, it has to make A LOT $$$ to be worthwile. Obtaining one is cheap and easy. Defending it is $$$$.
Many companies, will NOT patent proprietary processes because they do not want to disclose them to competition that they have a technological advantage over. Doing so does NOT protect them, at all. It THREATENS them, because there is usually a way around almost every patent. Especially in electronics and chemical processing industries.