In Sullivan v. Iron Silver Mining Company, the U.S Supreme Court ruled on a dispute over mining rights in Colorado. The plaintiff, Sullivan, claimed that he had located and developed a vein of mineral ore before the defendant company did so. However, he failed to perform $100 worth of labor or improvements on his claim within one year as required by federal law for maintaining exclusive right to it. Consequently, the defendant company performed work on this land and applied for a patent from the government which was granted. The court held that since Sullivan had not complied with statutory requirements necessary to maintain his claim rights over the mine site; hence he lost those rights even though he was first in time with discovery and location of valuable minerals thereon.

In the dissenting opinion for Sullivan v. Iron Silver Mining Company, Justice Bradley argued that the majority's decision was not in line with established principles of mining law and property rights. He contended that a mining claim should be considered as real estate, which can be owned and transferred like any other form of property. Therefore, he believed that when Sullivan sold his interest in the mine to another party without reserving any right to future profits from it, he effectively gave up all claims to those profits. According to Justice Bradley, this principle is fundamental to our system of property rights and should have been upheld by the court.