I've been in this position a couple of times during my career. Both times I sent an email to the HR department (always the least efficient of any large corp) s

I've been in this position a couple of times during my career. Both times I sent an email to the HR department (always the least efficient of any large corp) stating that I had created new intellectual property relating to mynewdomain.com. I include the relevant paragraphs of my employment contract and state that I believe I am compliant. I never say what my invention does or what I hope it will do. I never say what I projects worked on for the company. I never say what I want HR to do. I've never had any follow up except for a thank-you email, but then none of my ideas have become wildly successful.