Intellectual property is just a term used by people when they want to threaten generally. If you want to sue someone over IP then you have to choose a proper law.
This page shows a few types of right which are classed as IP, all of them require you to actually make something before you can have $25 million.
According to his complaint Google asked for any ideas so he gave them but was unhappy because they didn't pay him anything. He believes he has some unwritten contract because Google held a competition to find new and innovative mobile apps and were offering $10 million as first prize. He didn't write anything but thinks he has suffered because he would have sold the idea to someone else for like ... loads.