5 known cases. View patent page →
Direct-purchaser class action alleging Walker Process antitrust claims against Roche and Applera over the Taq polymerase patent. The court's 2005 opinion named US 4,683,195 and US 4,683,202 as related Roche PCR patents; the case later settled in 2008 for $33 million.
Roche sued Promega for infringement of US 4,889,818 and breach of the Cetus–Promega license agreement covering Roche's PCR process patents. The district court found the '818 patent unenforceable for inequitable conduct; the Federal Circuit vacated in part and remanded, and on remand the district court again held the patent unenforceable.
Federal Circuit appeal from the district court's inequitable conduct ruling. The court affirmed in part and reversed in part, upholding some findings and remanding for the district court to determine whether the surviving incidents justified unenforceability.
False marking action under 35 U.S.C. § 292 alleging defendants marked products with twenty-two expired PCR/molecular-biology patents, including US 4,889,818, after those patents had expired. The case was closed on 09/01/2011.
Listed in the Google Patents litigation record for US 4,889,818 as filed in 2003. The narrative states that parties, patent(s) asserted, and outcome could not be confirmed.