A Blog About Intellectual Property Litigation and the District of Delaware

Entries for tag: Affirmative Defenses

These hands actually look pretty clean.
These hands actually look pretty clean. Nathan Dumlao, Unsplash

Defendants in patent cases often seem to throw in somewhat obscure affirmative defenses with little or no factual support. "Unclean hands" is a classic example. Defendants will sometimes seem to include defenses like unclean hands and prosecution latches with no real factual support (and, I suspect, not always the best grasp on what those defenses really mean).

Judge Stark issued an opinion today on a motion to strike "unclean hands" and "prosecution laches" defenses offers an example of what happens when a defendant actually does adequately support these defenses.

First, the standard: to succeed on a motion to strike affirmative defenses, the insufficiency must be "clearly apparent":

"[P]ursuant to Rule …