Permatech Acquires Tri-Weld - 1/1/2005 Permatech Inc. of 911 East Elm Street in Graham is pleased to announce the acquisition of Tri-Weld Inc. of 2801 Troxler Road in Burlington. Permatech designs, engineers, and manufactures precision precast refractory components and equipment fo... [read more] Permatech Acquired by Managers - 1/1/2004 Permatech Inc. Managers Joseph Trettel and John Schneider are pleased to announce their acquisition of Permatech Inc. from former parent company Alcoa. Joe Trettel and John Schneider successfully completed the acquisition of Permatech, Inc. on... [read more]