Simple past tense and past participle of invalidate. (verb)
Examples of word invalidated
Woese called the DI's bluff and yes, you do look exactly like crackpots who claim that Einstein invalidated Newtonian physics.
Turns out that the sublet agreement I had with the guy who's room I was staying in invalidated his lease agreement cause I'm not a Kellogg college student.
Jim Louderback, who may have been a flashy personality on cable TV but obviously has never been either a lawyer or an engineer, is apparently ignorant of the fact is that the FCC's authority was not "invalidated" - it never had such authority in the first place, and was trying to usurp powers that neither we, the people nor our Congress ever gave it.
Recent developments have kind of invalidated it as it turns out that there is no single answer to the question.
The FDA also said an agreement it made with Cell Therapeutics that the company's trial would be sufficient for approval was "invalidated" because the trial was stopped early.