Mayo Collaborative Services v. Prometheus Laboratories, Inc.
566 U.S. 66 · Decided March 20, 2012 · Supreme Court of the United States
Record summary. This page is generated from the Supreme Court Database’s coded data about the case. It describes who decided what, not the Court’s reasoning. Read the opinion itself before relying on it. Not legal advice.
At a glance
Mayo Collaborative Services v. Prometheus Laboratories, Inc. was decided on March 20, 2012 unanimously (9–0). The Court reversed the lower court's decision. Justice Stephen G. Breyer wrote the opinion of the Court. SCDB classifies its main issue as “Patents” in the Economic Activity area.
Read the opinion
Case details
- Citations
- 566 U.S. 66 · 132 S. Ct. 1289 · 182 L. Ed. 2d 321 · 2012 U.S. LEXIS 2316
- Docket number
- 10-1150
- Decided
- March 20, 2012
- Argued
- December 7, 2011
- Court era
- Roberts Court
- Decision type
- Opinion of the Court (orally argued)
- Disposition
- Reversed
- Outcome for petitioner
- The petitioning party received a favorable disposition
- Vote
- 9–0 (unanimous)
- Majority opinion
- Stephen G. Breyer
- Opinion assigned by
- John G. Roberts Jr.
- How the case arrived
- Certiorari
- Issue (SCDB)
- Patents
- Issue area
- Economic Activity
- Legal provision
- 35-101
- Type of law
- Infrequently litigated statute
- Decision direction (SCDB)
- Liberal what this means
How the Justices voted
| Justice | Vote | Separate writing |
|---|---|---|
| Justice Antonin Scalia | Majority | |
| Justice Anthony M. Kennedy | Majority | |
| Justice Clarence Thomas | Majority | |
| Justice Ruth Bader Ginsburg | Majority | |
| Justice Stephen G. Breyer | Majority | Wrote an opinion |
| Chief Justice John G. Roberts Jr. | Majority | |
| Justice Samuel A. Alito Jr. | Majority | |
| Justice Sonia Sotomayor | Majority | |
| Justice Elena Kagan | Majority |
Full case caption
Mayo Collaborative Services, Dba Mayo Medical Laboratories, et Al., Petitioners v. Prometheus Laboratories, Inc.
SCDB identifiers: case 2011-034, docket 2011-034-01.
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Cases on the same legal provision: 35-101
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Source: Supreme Court Database, 2026 Release 01 (data file dated September 8, 2026). Imported into CaseTrail November 5, 2026. Coverage: decisions from the 1946 through 2025 Terms. Methodology · Report an error