Work at your own risk
This is why Statutes of Limitation are SO important. This guy filed a claim within 1 year of when he discovered that benzene caused his cancer, BUT it apparently was not filed within a year from when he was diagnosed (although the story is not clear on that). In this case, he got caught in a state law trap. The court told him that state law required that the claim be filed earlier.
Source: www.kake.com