Guides · Patent Litigation
Appeals to the Federal Circuit
Appeals in patent cases go to one court, the U.S. Court of Appeals for the Federal Circuit in Washington, D.C., whether the case was tried in Texas, decided at the ITC, or decided by the Patent Trial and Appeal Board.
· Law checked through October 20, 2026
In Short
Appeals in patent cases go to one court, the U.S. Court of Appeals for the Federal Circuit in Washington, D.C., whether the case was tried in Texas, decided at the ITC, or decided by the Patent Trial and Appeal Board. The court reviews claim construction and other legal rulings without deference, but gives deference to jury verdicts and agency fact-finding. The median appeal takes more than a year and a half, and many end in a one-line affirmance.
Common situations.
- A defendant loses at trial and wants to know whether to appeal and how long it will take.
- A party believes the claim construction was wrong and wants it reviewed before trial.
- A petitioner loses at the PTAB and asks whether it has standing to appeal.
Which court.
The Federal Circuit hears appeals from final decisions of district courts in cases arising under the patent laws, and from the PTAB and the ITC (28 U.S.C. § 1295(a)). Appeals in cases that only touch patent issues, such as some contract disputes, may go instead to the regional circuit, which for Texas is the Fifth Circuit. On procedural questions not unique to patent law, such as transfer of venue, the Federal Circuit applies the law of the regional circuit.
When to appeal.
- Deadline. A notice of appeal is due within 30 days after entry of the judgment appealed from (Fed. R. App. P. 4(a)(1)(A)). Timely post-trial motions extend the deadline.
- Final judgment rule. Claim construction rulings and most pretrial orders cannot be appealed right away. A party that cannot win under the court's construction may stipulate to a judgment so the construction can be reviewed.
- Exceptions. Orders granting or denying injunctions may be appealed immediately (§ 1292(a)(1)). A judgment final except for an accounting may be appealed before damages are set (§ 1292(c)(2); Robert Bosch, LLC v. Pylon Mfg. Corp., 719 F.3d 1305 (Fed. Cir. 2013) (en banc)). Mandamus is available in rare cases, most often to review transfer decisions.
- PTAB appeals. A party dissatisfied with a final written decision may appeal (35 U.S.C. § 319). A petitioner that appeals must show a concrete injury, such as a real risk of being sued (Consumer Watchdog v. Wis. Alumni Research Found., 753 F.3d 1258 (Fed. Cir. 2014)). Decisions denying institution generally cannot be appealed (§ 314(d)).
Standards of review.
| Issue | Standard |
|---|---|
| Claim construction | De novo, with deference to findings on extrinsic evidence (Teva Pharms. USA, Inc. v. Sandoz, Inc., 574 U.S. 318 (2015)) |
| Jury findings (infringement, anticipation, damages) | Substantial evidence |
| Obviousness | Legal conclusion reviewed de novo; underlying facts for substantial evidence |
| Patent eligibility (§ 101) | De novo, with any underlying facts reviewed for clear error |
| Evidentiary rulings, new trial, Daubert | Abuse of discretion, under regional circuit law |
| Attorney's fees and enhanced damages | Abuse of discretion (Highmark Inc. v. Allcare Health Mgmt. Sys., Inc., 572 U.S. 559 (2014); Halo Elecs., Inc. v. Pulse Elecs., Inc., 579 U.S. 93 (2016)) |
| PTAB fact findings | Substantial evidence (Dickinson v. Zurko, 527 U.S. 150 (1999)) |
What to expect.
- Timing. In fiscal year 2025, the median time from docketing to decision in merits appeals was 20.5 months for appeals from district courts and 21.0 months for appeals from the Patent Office.
- Briefing and argument. Opening, response, and reply briefs are followed by oral argument before a three-judge panel, often only 15 minutes per side.
- Summary affirmances. The court often affirms without an opinion under its Rule 36. The Supreme Court has declined to review challenges to that practice (ParkerVision, Inc. v. TCL Indus. Holdings Co., No. 24-518, cert. denied (U.S. Mar. 24, 2025)).
- Outcomes. The court may affirm, reverse, vacate and remand for further proceedings, or order a new trial. In 2025 it vacated large Texas verdicts in Optis and EcoFactor. See Patent Trials.
- Further review. A party may seek rehearing by the panel or by the full court, and then review by the Supreme Court, which grants few patent cases.
Enforcing a judgment during appeal.
A judgment for money can be enforced unless the court stays it, usually on the posting of a supersedeas bond (Fed. R. Civ. P. 62(b)). An injunction remains in effect during appeal unless the district court or the Federal Circuit stays it.
Sources.
- 28 U.S.C. §§ 1292(a)(1), 1292(c)(2), 1295(a).
- 35 U.S.C. §§ 314(d), 319.
- Fed. R. App. P. 4(a); Fed. R. Civ. P. 62(b); Fed. Cir. R. 36.
- Robert Bosch, LLC v. Pylon Mfg. Corp., 719 F.3d 1305 (Fed. Cir. 2013) (en banc).
- Consumer Watchdog v. Wis. Alumni Research Found., 753 F.3d 1258 (Fed. Cir. 2014).
- Teva Pharms. USA, Inc. v. Sandoz, Inc., 574 U.S. 318 (2015).
- Highmark Inc. v. Allcare Health Mgmt. Sys., Inc., 572 U.S. 559 (2014).
- Halo Elecs., Inc. v. Pulse Elecs., Inc., 579 U.S. 93 (2016).
- Dickinson v. Zurko, 527 U.S. 150 (1999).
- ParkerVision, Inc. v. TCL Indus. Holdings Co., No. 24-518 (U.S. cert. denied Mar. 24, 2025).
- U.S. Court of Appeals for the Federal Circuit, Median Disposition Time for Cases Decided by Merits Panels, FY2025.
This guide is general information, not legal advice. Law checked through October 20, 2026. See the Disclaimer.