Chapman Performance Products, Inc. v. Producers Sales, Inc.

This is an appeal by the defendants, Producers Sales, Inc., an Illinois corporation, Louis F. Guenther and Charles P. Barcik and C.F.C. Enterprises, from an order of the Circuit Court of Cook County denying a motion to dissolve a temporary injunction enjoining them from using the name “Kar-Lok” and from manufacturing and distributing or selling an anti-theft device bearing the trade name “Kar-Lok” and from violating or using the specifications under United States Patent No. 3,538,725.

The plaintiffs are Chapman Performance Products, Inc., an Illinois corporation, David F. Arlasky and Joyce…