DuPont sues French aerospace co over flame-barrier technology

REUTERS/Andrew Kelly

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  • Hutchinson SA provides allegedly infringing tech for Airbus planes
  • DuPont previously won related case against Boeing provider

(Reuters) – A unit of chemical giant DuPont de Nemours Inc sued a French manufacturing company for patent infringement in Delaware federal court over fire-prevention materials used in Airbus planes.

Hutchinson SA’s material barrier to prevent fires from penetrating a plane’s fuselage violates DuPont patents on its Nomex XF flame-resistant material, the lawsuit, filed Thursday, said. Airbus was not named as a defendant.

DuPont asked the court to block Hutchinson’s alleged infringement and requested an unspecified amount of damages.

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“We take this matter very seriously, and our filing underscores the action we will take to enforce our patent rights to protect our substantial investment in innovation,” a DuPont spokesperson said in a Friday statement.

Hutchinson did not immediately respond to a request for comment.

DuPont said Nomex XF is used to prevent fires outside the fuselage from spreading into commercial airliners. The lawsuit said Hutchinson’s Terflame 29 violates DuPont’s patents as a similar multilayer material barrier that prevents fires from spreading in the same way.

DuPont previously won more than $3 million from Tonawanda, N.Y.-based materials company Unifrax and a permanent ban on flame barriers it sold to Boeing that violated one of the patents at issue in the new lawsuit.

The case is DuPont Safety & Construction Inc v. Hutchinson SA, U.S. District Court for the District of Delaware, No. 1:22-cv-00797.

For DuPont: Kathryn Clune of Crowell & Moring, David Moore of Potter Anderson & Corroon

For Hutchinson: not available

Read more:

Fed Circuit affirms DuPont jury win in Unifrax patent case

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Blake Brittain

Thomson Reuters

Blake Brittain reports on intellectual property law, including patents, trademarks, copyrights and trade secrets. Reach him at blake.brittain@thomsonreuters.com

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