Insulation Panel Supplier Accuses Rival of Trade Secret Theft

Oct. 30, 2025, 5:44 PM UTC

Straight Line Industrial Services Inc. accused competitor Insultherm Inc. of improperly acquiring its trade secrets and interfering with a bid to supply insulation panels to Marathon Oil’s Illinois refinery.

Insultherm sent SLIS a notice on Oct. 21 stating the panels mentioned in the supplier’s confidential bid to Marathon infringed US Patent No. 10,323,190, according to a complaint filed Wednesday in the US District Court for the Southern District of Texas. SLIS said Insultherm sent the notice a day after SLIS submitted its bid.

“Insultherm’s actions were intended to harass and intimidate SLIS, chill SLIS’s competitive offering, and unfairly ...

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