A Texas inventor is suing law firm Seyfarth Shaw, among other defendants, alleging they caused him to lose control of a patent for a cleaning method for corrosive materials.

In a suit filed Wednesday, Loren Hatle is seeking up to $1 million in damages from the defendants, which also include former Seyfarth Shaw partner Cleve Glenn; Texas company  Berkeley Research Group (BRT) and its Houston managing director Clifford Wright Jr.; Louisiana resident Randy LeBoeuf; and MicroClean Metals, of Camas, Washington.