DuPont Sues Hutchinson on Fire-Blocking Material Sold to Airbus

DuPont de Nemours Inc. alleges that thermal acoustic blankets Hutchinson SA sells to Airbus infringe two patents for a laminate material that prevents fires outside an aircraft from penetrating the fuselage, according to a federal lawsuit in Delaware.

DuPont subsidiaries DuPont Safety & Construction Inc. and Dupont Specialty Products USA LLC say Hutchinson’s product, Terflame 29, infringes patents that cover DuPont’s competing Nomex XF, according to a complaint filed Thursday in the US District Court for the District of Delaware.

DuPont says it has supplied the aerospace industry with a variety of products for nearly 50 years and developed ...