Mayo Collaborative Services v. Prometheus Laboratories, Inc.

**What Happened** This case involved a dispute between two companies over a medical patent. Prometheus Laboratories claimed it owned the exclusive rights to a method for determining the right dosage of certain drugs by measuring natural substances (metabolites) in patients' blood. Mayo Collaborative Services was using a similar testing method, and Prometheus sued them for patent infringement, arguing Mayo was stealing their protected invention. **What the Court Decided** The Supreme Court ruled against Prometheus, finding that their patent was invalid. The Court determined that Prometheus was essentially trying to patent a natural biological process - how the human body breaks down medicine. Since this is a natural phenomenon that occurs in everyone's body, it cannot be owned as private property through a patent, even when combined with routine testing procedures. **Why This Matters for Workers** This ruling helps protect workers in medical and scientific fields from overly broad patent claims. It means companies cannot monopolize basic biological processes or natural phenomena, which keeps essential medical testing methods available to more healthcare providers. This can lead to lower costs for medical tests and prevents one company from controlling fundamental scientific knowledge that should benefit everyone.