it shows gretchen and elliot as being exploitative and willing to use Walt as a means to an end for their own ‘sainthood’. they obviously lied in the interview as the party had multiple people talking about walt’s brilliance at problem solving and we also know walt had at least one patent.
which may lend some credence to the bad feelings and the way walt remembers things going down at Gray Matter, he may be right they screwed him out of things.
I’m they’re picking up the Gray Matter thing because that’s a thread they put out there in season 1 and have mostly ignored since then. We know there’s definitely 2 versions of the story because the Schwarz’s don’t seem to have a problem with Walt, from what we’ve seen they like him, were willing to give him money, even seemed to want to bring him back into the company. But Walt is very much against all that, there was some vague hint he didn’t like the direction the company went, but it has never been explained even a little.
On his way to retrieve the ricin, maybe Walt stops at a very big national law firm, pays a very large cash retainer, and executes a last will and testament. The patent(s), and any associated intellectual property in Gray Matter, are noted in the will as legitimate assets of his pending estate (Walt is dying no matter what). The beneficiaries of the estate are to be his family, whether they like it or not. A man provides for his family, as Gus said.
So Walt redeems his name, showing that his “life’s work” was not really the drugs but applied science. Gray Matter eventually settles for 1 billion dollars because Walt likely had more inchoate financial interest than that in the company, and the Schwartzes want to distance themselves from the W.W. affair. Thus, in the end, crime does not pay, Walter suffers the penalties of his tragic hubris, and the law prevails because it is righteous.