Legal Opinion

HENGST SE v. Champion Laboratories, Inc.

District Court, N.D. Illinois

Decided September 17, 2024No. 1:23-cv-00794Unknown

1Opinion

UNITED STATES DISTRICT COURT NORTHERN DISTRICT OF ILLINOIS EASTERN DIVISION HENGST SE, ) ) Plaintiff, ) ) No. 23 C 794 v. ) ) Judge Sara L. Ellis CHAMPION LABORATORIES, LLC, ) ) Defendant. ) OPINION AND ORDER Plaintiff Hengst SE (“Hengst”) filed this lawsuit against Defendant Champion Laboratories, LLC (“Champion”), alleging that Champion infringed on Hengst’s patent for a removable and replaceable oil filter,

U.S. Patent No. 9,023,203

(the “’203 Patent”). The parties seek construction of one phrase, “rotating the ring filter insert relative to the filter housing,” which appears in independent…

2Cases cited17 opinions

Edward H. Phillips v. Awh Corporation, Hopeman Brothers, Inc., and Lofton Corporation, Defendants-CrossCourt of Appeals for the Federal Circuit · 2006
Vitronics Corporation v. Conceptronic, Inc.Court of Appeals for the Federal Circuit · 1996
Renishaw Plc v. Marposs Societa' Per Azioni and Marposs CorporationCourt of Appeals for the Federal Circuit · 1998
Vivid Technologies, Inc. v. American Science & Engineering, Inc.Court of Appeals for the Federal Circuit · 1999
United States Surgical Corporation v. Ethicon, Inc. And Johnson & Johnson Hospital Services, Inc., Defendants/cross-AppellantsCourt of Appeals for the Federal Circuit · 1997

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