A drain pan for radiators and cooling systems includes a base panel which is molded or otherwise formed into a coffer shape defined by upstanding sidewalls extending continuously about the perimeter of the base panel. The base panel includes upwardly extending shoulders raised slightly above the base...http://www.google.com.au/patents/US4392552?utm_source=gb-gplus-sharePatent US4392552 - Drain pan for radiators and cooling systems
