After a series of discussions about the level of dependency of a research student on his advisor in this link and this link, a question comes to mind that when the person is graduated and leaves the university; even he is now working independently in a company or he is a faculty member of a university; as far as most of the researches he is going to do may be based on his PhD dissertation;
Until when should this person contact his supervisor about the researches he is doing?
Should he ethically acknowledge that his researches is roots of his PhD project under his advisor's supervision?
If, based on his dissertation, he works on a research project; should he talk about it to his supervisor and he should be aware on every single after-PhD project? Just because the base of the publication and research is the PhD dissertation which is done under his supervision?
To put in a nutshell, as a matter of academic ethics, what are exact rights of a supervisor in projects done based on his student's supervision (after graduation of the person)? What are the rights of the university from which the student is graduated?