After more than two weeks of testimony and years of previous litigation, the $20 million case that pits water filtration company Purolite against its former law firm, Morgan Lewis & Bockius, could come down to the first question on the verdict sheet — whether the case is barred by the statute of limitations.

Although attorneys for both sides in Bro-Tech v. Morgan Lewis spent the majority of Tuesday morning’s closing statements discussing whether Purolite and its owners, Stefan and Don Brodie, should prevail in their breach of contract claim against the firm, they concluded with discussions of whether the claim was properly filed within the four-year statute of limitations. Bro-Tech is the parent company of Purolite.