From upcounsel.com...

"Published and granted patents look very similar, so they can easily be mistaken. Just because a patent application is published, it won't always be granted. Patent applications are published in order to make the public sphere aware of what is seeking patent protection."

And then interestingly...

"If you do have a granted patent on an invention, a manufacturer might want to purchase the rights to create your idea through a patent license, but because the patent has been granted, this can cost the manufacturer lots of money. Sometimes, manufacturers will try to get licensed while the patent is still in the published application phase and not yet granted. This can save them a bit of money."

Rogue