Guides · Patent Litigation

Pleadings and Early Motions

A patent complaint must plausibly allege infringement of specific claims by specific products; a bare recitation no longer suffices.

Published October 20, 2026 · Last reviewed October 20, 2026Law checked through October 20, 2026

In Short

A patent complaint must plausibly allege infringement of specific claims by specific products; a bare recitation no longer suffices. The first months of a case are dominated by motions: to dismiss, to transfer, to stay for a Patent Office review, and sometimes for a preliminary injunction. The Supreme Court tightened the pleading standard for induced infringement in June 2026.

Common situations.

A defendant receives a complaint that names a product but does not explain how it meets the claims.
A defendant believes the patent claims an abstract idea and wants out before discovery.
Several unrelated companies are sued together over the same patent.
A defendant has filed for inter partes review and wants the court case paused.

The complaint.

A patent complaint must meet the plausibility standard that applies to all federal complaints (Bell Atl. Corp. v. Twombly, 550 U.S. 544 (2007); Ashcroft v. Iqbal, 556 U.S. 662 (2009)). The bare-bones patent form that once satisfied the rules was abolished on December 1, 2015.

Direct infringement. For simple technology, identifying the accused products and alleging that they meet each claim element, with photos or descriptions, can be enough (Disc Disease Sols. Inc. v. VGH Sols., Inc., 888 F.3d 1256 (Fed. Cir. 2018)). For complex technology, the complaint must plausibly allege facts for each element. Merely copying claim language is not enough, and a complaint that contradicts its own theory can be dismissed (Bot M8 LLC v. Sony Corp. of Am., 4 F.4th 1342 (Fed. Cir. 2021)).
Induced infringement. The complaint must plausibly allege that the defendant took active steps to encourage infringement, knowing of the patent. Product labels or marketing that do not encourage the patented use are not enough (Hikma Pharms. USA Inc. v. Amarin Pharma, Inc., No. 24-889 (U.S. June 4, 2026)). See Types of Patent Infringement.
Willfulness. The complaint must allege facts showing the defendant knew of the patent and of its infringement. Courts differ on whether knowledge gained from the complaint itself supports a claim for later willful infringement.

Joining several defendants.

Unrelated accused infringers may be sued together only if the claims against them arise from the same transaction or occurrence relating to the same accused product or process. Allegations that each infringes the same patent are not enough (35 U.S.C. § 299). Patent owners therefore often file separate suits against each defendant, which the court may consolidate for pretrial purposes.

The answer and counterclaims.

The answer must deny or admit each allegation and state affirmative defenses such as invalidity, license, exhaustion, and limits on damages. Most defendants also counterclaim for declarations of noninfringement and invalidity, which keeps those issues alive if the patent owner later drops its claims.

Inequitable conduct must be pleaded with particularity: who withheld or misrepresented what, when, where, and how, and why it mattered to examination, with facts supporting an inference of intent (Exergen Corp. v. Wal-Mart Stores, Inc., 575 F.3d 1312 (Fed. Cir. 2009)).

Early motions.

Motion	What it argues	Notes
Dismiss for failure to state a claim (Rule 12(b)(6))	The complaint does not plausibly allege infringement, or the claims are ineligible under § 101	Eligibility can be decided on the pleadings, unless the complaint plausibly raises a factual dispute (Aatrix Software, Inc. v. Green Shades Software, Inc., 882 F.3d 1121 (Fed. Cir. 2018))
Dismiss or transfer for improper venue (Rule 12(b)(3); 28 U.S.C. § 1406)	Venue is improper under § 1400(b)	The patent owner bears the burden of showing venue is proper (In re ZTE (USA) Inc., 890 F.3d 1008 (Fed. Cir. 2018)). The objection is waived if not raised in the first response
Transfer for convenience (§ 1404(a))	Another district is clearly more convenient	See Where Patent Cases Are Heard
Stay pending PTAB review	The Patent Office may cancel or narrow the claims	Courts weigh the stage of the case, whether a stay will simplify the issues, and prejudice to the patent owner
Stay of customer suits	The manufacturer's case will resolve the dispute	See Other Defenses and Limits on Recovery
Preliminary injunction	The patent owner needs relief before trial	The owner must show likely success, including against validity challenges, irreparable harm, a favorable balance of hardships, and no harm to the public interest (Winter v. NRDC, Inc., 555 U.S. 7 (2008); Amazon.com, Inc. v. Barnesandnoble.com, Inc., 239 F.3d 1343 (Fed. Cir. 2001))

Texas notes.

Western District of Texas. Under the standing order used in Waco, transfer motions were due by the later of three weeks after the case management conference or eight weeks after service, and venue discovery was limited. Whether those procedures continue after Judge Albright's departure is not yet settled. Check the current standing orders of the assigned judge.
Eastern District of Texas. Under Fifth Circuit law, a transfer motion should be decided promptly, before the court turns to the merits (In re Horseshoe Entm't, 337 F.3d 429 (5th Cir. 2003)). Requests to stay a case before the Patent Office decides whether to institute review are often denied.
Eligibility motions. Judges differ on whether to decide § 101 motions on the pleadings or wait for claim construction.

Sources.

35 U.S.C. § 299.
28 U.S.C. §§ 1400(b), 1404(a), 1406.
Fed. R. Civ. P. 8, 9(b), 12(b)(3), 12(b)(6), 12(h); Form 18 (abrogated Dec. 1, 2015).
Bell Atl. Corp. v. Twombly, 550 U.S. 544 (2007).
Ashcroft v. Iqbal, 556 U.S. 662 (2009).
Disc Disease Sols. Inc. v. VGH Sols., Inc., 888 F.3d 1256 (Fed. Cir. 2018).
Bot M8 LLC v. Sony Corp. of Am., 4 F.4th 1342 (Fed. Cir. 2021).
Hikma Pharms. USA Inc. v. Amarin Pharma, Inc., No. 24-889 (U.S. June 4, 2026).
Exergen Corp. v. Wal-Mart Stores, Inc., 575 F.3d 1312 (Fed. Cir. 2009).
Aatrix Software, Inc. v. Green Shades Software, Inc., 882 F.3d 1121 (Fed. Cir. 2018).
In re ZTE (USA) Inc., 890 F.3d 1008 (Fed. Cir. 2018).
Winter v. Natural Res. Def. Council, Inc., 555 U.S. 7 (2008).
Amazon.com, Inc. v. Barnesandnoble.com, Inc., 239 F.3d 1343 (Fed. Cir. 2001).
W.D. Tex. Standing Order Governing Proceedings (OGP) 4.0, Patent Cases (Mar. 7, 2022).
In re Horseshoe Entm't, 337 F.3d 429 (5th Cir. 2003).

This guide is general information, not legal advice. Law checked through October 20, 2026. See the Disclaimer.