Roy Lessy, a former partner at Patton Boggs, is suing the firm for discrimination, claiming he was treated unfairly and not paid money he was owed after he resigned because he had a disability.

Lessy, 69, worked at the firm for nearly seven years before he resigned in mid-2011. In a lawsuit filed yesterday in District of Columbia Superior Court, he accused the firm of failing to adjust his compensation formula to take his disability into account and, after he left, of wrongfully refusing to return money he contributed to the firm when he was first hired as promised.