The maker of Dude Wipes, a line of disposable hygiene wipes, got some but not all claims dismissed in a potential class action alleging the company’s assertions that the wipes are flushable are false, a federal court in Illinois said Thursday.

Dude Wipes, once featured on an episode of Shark Tank, aren’t flushable because they don’t disperse in a reasonable amount of time after flushing or clear sewage systems without clogging, the plaintiffs allege. They say that a disclaimer panel Dude Products Inc. placed on the side of the box, warning in part that not all systems can handle the ...