. the complaints allege that the defendants , during the period october 1 , 1993 through november 30 , 1995 , conspired to limit the supply of linerboard , and that the purpose and effect of the alleged conspiracy was to artificially increase prices of corrugated containers and corrugated sheets , respectively . on november 3 , 2003 , pactiv ( formerly known as tenneco packaging ) , tenneco and pca entered into an agreement to settle the class action lawsuits