Chevron Corp. will be allowed to bring counterclaims against Patton Boggs in the long-running battle over the legitimacy of a multi-billion dollar environmental judgment against the oil company in Ecuador.

Patton Boggs had sued Chevron in 2012 for execution of a $21.8 million bond, attorney fees, malicious prosecution and unjust enrichment for claims Chevron made against Patton Boggs in the law firm’s representation of Ecuadorian plaintiffs seeking to defend, and collect on the judgment.

Souther District Judge Lewis Kaplan on Monday rejected Patton Boggs’ argument that there was a lack of jurisdiction for Chevron’s counterclaims, which accuse Patton Boggs of fraud, violations of N.Y. Judiciary Law §487 in litigation in U.S. District Courts and Courts of Appeals in New York and malicious prosecution. Randy Mastro, a partner with Gibson, Dunn & Crutcher and James Tyrrell, a partner at Patton Boggs are the lead lawyers in the case of Patton Boggs LLP. v. Chevron Corp., 12-cv-09176.

Kaplan on March 4 held that New York attorney Steven Donziger corrupted and defrauded the judiciary in Ecuador to secure the judgment, and the judge issued an injunction against Donziger’s efforts to enforce it (NYLJ, March 5).

Donziger denies Chevron’s allegations and is now appealing the judge’s ruling.