Mayo Collaborative Services v. Prometheus Laboratories, Inc.

**What This Case Was About** This case involved a dispute between two companies over a patent for a medical testing method. Prometheus Laboratories claimed they owned the exclusive rights to a process that helps doctors determine the right drug dosage for patients by measuring certain chemical levels in their blood. Mayo Collaborative Services was accused of using this method without permission. **What the Court Decided** The Supreme Court ruled against Prometheus, deciding that their patent was invalid. The Court found that Prometheus was trying to claim ownership over a natural biological process - how the human body breaks down certain medications. Since this is essentially a law of nature, it cannot be patented, even when combined with basic testing steps that doctors would naturally follow. **Why This Matters for Workers** This decision helps protect workers in medical and scientific fields from overly broad patents that could limit their ability to do their jobs. It prevents companies from claiming exclusive ownership over fundamental scientific processes or natural phenomena that should remain available for all researchers, doctors, and medical professionals to use. This promotes innovation and ensures that basic scientific knowledge stays in the public domain where it can benefit everyone.