A Practice Note describing key considerations for the patent owner's and accused infringer's counsel when preparing motions to dismiss or strike claims and counterclaims in patent litigation under Rule 12 of the Federal Rules of Civil Procedure (FRCP). In particular, this Note discusses grounds for moving to dismiss infringement, invalidity, and inequitable conduct claims and counterclaims under FRCP 12(b)(6). It also discusses motions to dismiss for lack of subject matter or personal jurisdiction or improper venue and motions to strike under FRCP 12(f).