E. I. Du Pont De Nemours Powder Co. v. Masland
Headline: Decision protects employers’ trade secrets by blocking an ex-employee from disclosing confidential manufacturing processes to outside experts, while giving judges limited authority to permit controlled disclosures under safeguards.
Holding: The Court reversed the decree, holding that because the defendant learned information under a confidential relationship, courts may enjoin disclosure of alleged trade processes to outside experts while leaving trial judges discretion to permit guarded disclosures.
- Allows judges to bar former employees from sharing trade secrets with outside experts
- Gives trial judges discretion to reveal secrets to others under precautions
- Protects employers’ confidential manufacturing processes learned during employment
Summary
Background
The plaintiffs were employers who said the defendant, Walter E. Masland, learned their secret methods while working for them. Masland planned to make artificial leather, and the employers sued to stop him from using or telling others about processes they said were confidential. The case moved through the lower courts: a preliminary injunction was first refused, a later district-court injunction barred disclosure to outside experts during proof-taking (except to counsel), a motion to dissolve was denied, and an appeals court reversed before the Supreme Court agreed to review the matter.
Reasoning
The central question was how to balance the employers’ confidential information against the defendant’s need to make a full defense. Justice Holmes explained that the important fact is the confidential relationship: even if calling the information "property" is uncertain, the defendant accepted a special confidence and must not abuse it. The Court approved limits on revealing the plaintiffs’ alleged processes to outside experts or witnesses while making clear that the trial judge has discretion to decide whether, to whom, and under what precautions any necessary disclosure should be made.
Real world impact
The ruling protects employers’ confidential processes learned by former employees, while still allowing defendants a fair chance to defend under court supervision. It places control over expert access and secret information with the trial judge and sends the case back to the lower court for further proceedings rather than resolving the underlying dispute now.
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