Lowe's is denying discrimination claims filed last month in federal court by a Rockport man who says he was fired from the Thomaston store following knee surgery.

Lowe's Home Centers LLC. asked the U.S. District Court Aug. 18 to dismiss the case filed by 64-year-old Albert M. Lustgarten, who was employed as a department manager at the Thomaston Lowe's from 2007 to 2014.

Lustgarten is claiming disability discrimination, retaliation and age discrimination, and, according to court documents, states he was fired from his job in September 2014 after returning from a medical leave for knee surgery. He also stated in his claim that Lowe's has a practice of terminating older employees with medical conditions.

Lowe's, through its attorneys, Brian Champion and Tyler Smith, of Kennebunk, is denying all claims and states Lustgarten was terminated after repeated instances of rude and uncooperative behavior, according to court documents.

It also states if the retaliation claim is allowed to proceed, the plaintiff should not be awarded any civil penal, compensatory and punitive damages or attorneys' fees, because he failed to file a retaliation claim with the Maine Human Rights Commission.

Lustgarten, in his claim, says he has complied with all administrative requirements and received a right to sue letter from the Maine Human Rights Commission.

"All actions taken by the defendant were in good faith and for legitimate non-discriminatory and non-retaliatory reasons," the court documents state. "Damages, if any, suffered by the plaintiff were caused by his own conduct and/or negligence."

Lustgarten is being represented by attorney Guy Loranger of Old Orchard Beach.