Potter v. Hilemn Laboratories, Inc.

**What Happened** This case involved employees (the Potters) who had worked for Hilemn Laboratories and apparently used a special silvering solution for making mirrors after leaving the company. The company claimed this solution was a trade secret that the former employees weren't allowed to use. However, the employees argued that since the patent on this solution had already expired, it was no longer secret and they should be free to use it. **What the Court Decided** The court sided with the company. Even though the patent had expired (which normally makes information public), the court ruled that the employees were still bound by their original agreement with the company. In that agreement, they had promised to treat the silvering solution as a trade secret, regardless of whether it technically qualified as one under the law. **Why This Matters for Workers** This ruling shows that employment agreements can restrict workers even when the underlying legal reason for the restriction no longer exists. If you sign an agreement promising to keep certain information confidential or treat it as a trade secret, that promise may continue to bind you even if the information later becomes publicly available through patent expiration or other means. Workers should carefully review any confidentiality agreements before signing them.