Chevron Corp. wants an Ontario judge to dismiss an attempt to force the company to use its Canadian subsidiaries…to cover a controversial $18.3-billion (U.S.) judgment levelled against the oil giant by an Ecuadorean court last year. It’s the latest move in…a tangled 19-year fight that pits Chevron against lawyers for a group of Ecuadorean villagers who accuse the former Texaco, which Chevron acquired in 2001, of leaving open pits of contaminated oil waste in the Amazon rain forest…Chevron has denied the allegations…Chevron calls the judgment from the Ecuadorean court “illegitimate,” and has refused to pay it…The epic fight shifted to Canada…when the plaintiffs moved in May to try to enforce their Ecuadorean judgment in Ontario Superior Court…The first round of the Canadian bout looks set to focus on Chevron’s corporate structure…