RUŌOD Lab

Mastery course · Elite Professional Practice

Confidentiality, Trade Secrets and What Protects a Formula

Why formulas are protected mostly as trade secrets, what the EU directive and US law require, why reverse engineering is lawful, and what copyright has done.

Mastery 45 min study By the RUŌOD Lab team Updated

In short

Fragrance formulas are protected mostly as trade secrets: a patent would require publishing the formula, and a formula is valuable precisely because it is not known. Trade-secret protection lasts as long as the secret does, and in the EU it requires that the information be secret, valuable because secret, and protected by reasonable steps. It does not stop someone analyzing a bought perfume — reverse engineering of a lawfully acquired product is lawful under the EU directive — which is why practical confidentiality matters as much as law. Copyright in a scent was accepted by a Dutch court in 2006 and remains unsettled elsewhere.

What you will learn

  • Explain why fragrance formulas are protected mainly as trade secrets rather than by patent
  • State the three conditions of a trade secret under the EU directive, and the reasonable-steps idea in practice
  • Recognize that independent discovery and reverse engineering of a lawfully obtained product are lawful under that directive
  • Describe what the Kecofa v Lancôme decision did, and why copyright in scent is unsettled

Before this lesson: Industrial Compounding and Scale-Up, Who Owns Your Formulas: Study Guide, Building a Market Requirements Matrix

Before you start

This assumes who owns your formulas and the market requirements matrix. This lesson is general education, not legal advice; laws differ by jurisdiction, and agreements should be drafted by a lawyer for yours. Sources were read on 2026-11-03.

Why not patents

A patent requires disclosure in exchange for a limited term of exclusivity. New molecules are patented by the houses that discover them, and some are then kept as captives for the house's own use, as the captive molecules guide describes. Whole formulas rarely are: publishing one would hand it to every competitor once the patent expired, and the formula's value lies in its being unknown now.

The trade secret, in the EU

Directive (EU) 2016/943 defines a trade secret by three conditions: the information is secret, has commercial value because it is secret, and has been subject to reasonable steps to keep it secret. It gives holders civil remedies against unlawful acquisition, use and disclosure, and it lets courts restrict access to trade secrets during proceedings. It also lists lawful acquisition: independent discovery, and observation, study or testing of a product that has been made available to the public or is lawfully held, unless a valid duty limits that. In the United States the Defend Trade Secrets Act provides a federal civil action; state laws also apply.

Reasonable steps, in practice

  • Access by need. Few people hold the full formula; the record shows who.
  • Agreements. Confidentiality agreements with clients, manufacturers and staff, drafted for your jurisdiction.
  • Splitting. A manufacturer receives compounded bases or premixes, so no one outside holds the whole.
  • Marking and storage. Formula files marked confidential, stored with access control, never in public repositories (the diff lesson's warning about Git).
  • Exit and handover. What happens to formulas when a collaboration ends is agreed before it starts.

What analysis can and cannot reveal

GC-MS of a finished perfume identifies many components and approximate proportions, but struggles with naturals' exact grades, trace components, captives and how bases were built. Legally, analyzing a bought product is generally lawful under the directive; practically, a well-split, natural-rich formula is harder to reproduce than its analysis suggests, as the reconstruction limits guide explains.

In Kecofa v Lancôme (16 June 2006) the Dutch Supreme Court held that the scent of Trésor could be protected by copyright and was infringed by a perfume sharing most of its ingredients. The protection attached to the scent, not the recipe. Courts elsewhere have reached different conclusions, and the Court of Justice of the EU later declined to recognize copyright in a taste, so copyright is not a dependable protection for a formula in most places.

Limitations

The legal summary is deliberately general and dated. Contract terms, employment law and the law of the country where a dispute arises decide real cases.

Research application

How much of a commercial fragrance can be reconstructed from routine GC-MS by a skilled perfumer, measured by blind panel similarity? Studies would inform both the practical value of secrecy and the legal debates about it.

Practical exercise: Audit how one of your formulas is protected

About 120 minutes · You will have: a confidentiality audit of one formula: who has access, in what form, under what agreement, what a GC-MS analysis would reveal, and three improvements

  1. Choose one formula you would not want copied.
  2. List everyone and everything that holds it: people, files, devices, manufacturers, exports, backups, and in what form (full formula, base, premix).
  3. For each, record the agreement or control that applies, or that none does.
  4. Write what a GC-MS analysis of the finished product would likely reveal, and what it would likely miss.
  5. Propose three improvements, in order of value.

You have done this well if every holder is listed, gaps without agreements are named rather than assumed covered, the analysis estimate draws on the reconstruction lessons, and the improvements are specific steps rather than "be careful".

Common mistakes

  • Relying on copyright. It is unsettled and narrow.
  • Sending a full formula to a manufacturer without need or agreement.
  • Treating this lesson as legal advice.

Key terms

Trade secret
Under the EU directive, information that is secret, has commercial value because it is secret, and has been subject to reasonable steps to keep it secret.
Reasonable steps
The measures a holder takes to keep information secret — access limits, agreements, marking, splitting — judged against the circumstances.
Formula splitting
Supplying a manufacturer with compounded bases or premixes rather than the full formula, so that no single party holds it.

Knowledge check

1. Which three conditions does the EU trade secrets directive set?
Show the answer

Secret, commercially valuable because secret, and subject to reasonable steps to keep it so. Those are the directive's conditions; the third list describes patents.

2. A competitor buys your perfume and analyzes it by GC-MS. Under the EU directive this is…
Show the answer

Generally a lawful way to acquire information, unless a contract forbids it. The directive treats observation, study and testing of a lawfully acquired product as lawful acquisition, subject to contractual restrictions.

3. What did the Dutch Supreme Court decide in Kecofa v Lancôme (2006)?
Show the answer

That Trésor's scent could be protected by copyright and was infringed. It accepted copyright in the scent; other courts have taken different views, so the question is unsettled.

Sources

Further reading and materials

Written and reviewed by the RUŌOD Lab team. This is general education, not legal, regulatory, medical or safety advice. Example dilutions and exercises are for learning, are not validated products, and have not been safety-assessed. Completing a lesson confers no qualification. How we check these lessons.