To dredge this up. Does anyone have any examples of proposals for using someone's IP?
Sorry, I know this was asked a while ago, but this seemed like an important enough question to warrant an answer as other people may come across this thread with the same question.
I've used someone else's IP before. The requests I sent were just plainly written questions, not anything crazy written in some special legal code.
I came across a drawing of yours posted on (URL). I want to use this drawing for (quick project description). May I have your permission to do so?"
Obviously the responses vary. Many people are ok with it and will give you permission for free. Some will refuse or want to sell you a license. If you do obtain permission, it is a good habit to save the conversation (save emails, screenshot IMs or Facebook messages, etc) for future reference.