Two years ago, I was hired by a university to develop a software system. They had worked on it for five years, but only in a very low priority mode, so all they had was a database layout that was mostly in good shape. My supervisor hired me to take this project as my sole priority, and he has protected me from being involved in anything else. Within a year, I had deployed a system that the main users were very happy with. Over the last year, we have enhanced the software and expanded it to where every person in our department (students, faculty and staff) can use it. Over that whole time, I was the only one actually doing any of the code in the software, but there were many times when I got stuck and went to my supervisor and he gave me the guidance I needed to get past the problem. We often discussed design decisions, deployment strategy, user interface, etc.
Now, we want to commercialize the software. The University has a process for that, and he started the ball rolling by filling out the appropriate form. But, he filled it out as if I was the only author of the software. This means that I would get all of the author royalties, and he would get none. I am not comfortable with this. The form asks for authors and percentage contribution, so I went to him and talked to him and pushed for him to name a percentage. With a little pushing, he threw out 1%. I said I would start the form with 10%, but that if he felt it should be different, that I would be ok with it.
Should I do different on this? Should I increase his percentage contribution? Any words of wisdom on how to deal with this? What is a reasonable percentage contribution for a supervisor who has been really awesome about not only protecting me from other priorities, but also has given excellent guidance on design, coding, user interaction, etc.?
In Summary: My supervisor did not want to assume ownership of a product I developed with his help, but seemed willing to accept 10%. Am I being greedy by saying only 10%?