United States Gypsum Co. v. Lafarge North America, Inc.

MEMORANDUM OPINION AND ORDER

HART, District Judge.

In its Second Amended Complaint, plaintiff United States Gypsum Company (“USG”) alleges that defendant LaFarge North America, Inc. (“LNA”) has infringed certain claims of USG’s U.S. Patent No. 5,683,635 related to producing foamed gypsum wallboard. Defendant LaFarge, S.A. (“LSA”), a French corporation that owns a majority share of LNA, is also alleged to be liable for patent infringement. 1 Also named as defendants are ten individuals (collectively, the “Individual Defendants”) who are current or former employees of LNA and who worked for USG…