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A patented DNA sequence is not automatically protected merely because laboratory tests find it in a product. In Monsanto Technology LLC v Cefetra BV and Others, Case C-428/08, the Court of Justice of the European Union held on 6 July 2010 that Article 9 of Directive 98/44/EC requires the genetic information to be performing the function for which it was patented in the material where it is found. Residual DNA in processed, dead soy meal no longer made a soybean resistant to glyphosate, so its presence alone could not support a patent-based ban on marketing that meal.
The direct answer: presence is not enough
The ruling is best understood as a function test. A patent owner cannot invoke the special protection for a patented genetic sequence simply by showing that fragments of the sequence remain in a product. The sequence must be doing the job identified in the patent in that product or organism.
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In Monsanto’s case, the patented sequence had a specific biological role: when introduced into soybean DNA, it made a living soybean plant resistant to glyphosate. Soy meal is produced after the beans are processed. The meal imported into the Netherlands contained residual DNA associated with the resistant soybean, but the meal was no longer a living soybean plant and the DNA could not confer glyphosate resistance there. The Court therefore found that Article 9 could not be used to prohibit marketing the meal.
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This was a decision about European patent protection under the Biotechnology Directive in a particular factual setting. It did not declare DNA patents generally invalid, decide that DNA can never be patented, or establish an automatic rule for every processed food, feed, jurisdiction or later dispute.
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Case at a glance
| Item | What the case established |
|---|---|
| Case | Monsanto Technology LLC v Cefetra BV and Others, Case C-428/08 |
| Court and date | Court of Justice of the European Union, judgment issued 6 July 2010 |
| Legal provision | Article 9 of Directive 98/44/EC on the legal protection of biotechnological inventions |
| Patented subject | A DNA sequence that, when introduced into soybean DNA, made the soybean resistant to glyphosate |
| Product in dispute | Soy meal imported from Argentina into the Netherlands during 2005 and 2006 |
| Evidence of the sequence | Tests arranged by Monsanto detected characteristic residual DNA associated with the resistant soybean |
| Holding | The sequence had to perform its patented function in the material containing it; residual DNA in processed soy meal no longer did so |
What Monsanto’s patent was supposed to do
The invention was not described as DNA existing in the abstract. Its practical purpose was tied to a living soybean. Monsanto’s sequence, once introduced into the soybean’s DNA, gave the plant resistance to glyphosate. That resistance was the function for which the sequence received patent protection in the European context considered by the Court.
This functional link matters because Article 9 of Directive 98/44/EC addresses biological material containing genetic information. The provision does not treat every molecule carrying a sequence as equivalent, regardless of what the sequence is capable of doing. The legal protection is connected to the information’s function in the material in which it is contained.
In a living resistant soybean, the sequence could operate as part of the plant’s genetic system and produce the claimed trait. In a processed ingredient, the same letters of DNA may remain detectable while being biologically inactive. The Court’s analysis separated those two situations instead of treating the sequence’s chemical presence as conclusive.
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Large-scale cultivation in Argentina
Resistant soybean was cultivated on a large scale in Argentina. The official account of the case states that Monsanto’s invention was not protected by a patent there. That fact helps explain why soy meal made from Argentine crops became the focus of an import dispute in Europe: the product could be produced without an Argentine patent being asserted, but Monsanto sought to rely on European rights when the meal entered the Netherlands.
Imports and DNA testing
European companies imported the meal into the Netherlands in 2005 and 2006. Monsanto arranged tests that found traces of the characteristic DNA associated with the resistant soybean. The discovery did not show that the meal could grow into a resistant soybean or that the sequence was expressing the resistance trait in the meal. It showed that residual genetic material survived processing in a detectable form.
The Dutch court’s question
The Dutch proceedings raised a focused issue: is the mere presence of a patented DNA sequence in marketed soy meal enough to invoke Article 9 and stop the product from being marketed? Because the issue concerned the meaning of an EU directive, the Dutch court sought an authoritative interpretation from the CJEU.
The Court’s function-based interpretation of Article 9
The CJEU’s press release summarized the rule in a sentence that captures the holding: “A European patent can only be relied on in relation to an invention which actually performs the function for which it is patented.” The statement is the Court’s summary in its 6 July 2010 press and information release; it is not attributed to an individual judge.
Function in the material where the sequence is found
The relevant question is not simply whether the sequence can be identified. It is whether the genetic information is currently performing its patented function in the material containing it. For Monsanto’s invention, that meant asking whether the DNA in the soy meal was making a soybean plant resistant to glyphosate. The answer was no: the meal was processed material, not a living soybean capable of expressing that trait.
Processing changed the legal significance
Processing did not necessarily erase every molecule of DNA. Instead, it changed what the material was and what the DNA could do in that material. Once the soybean had been turned into meal, the residual sequence no longer carried out the biological activity identified in the patent. Detectability and functionality therefore came apart.
A possible future function was not enough
The Court also rejected a hypothetical future-function theory. It was not sufficient that the sequence might be able to perform its function again if it were placed in another plant. For patent protection to apply in relation to that plant, the sequence would have to be introduced into the plant and actually perform the claimed function there. A theoretical possibility of later use could not substitute for present function in the material at issue.
What the judgment means for food, feed and imports
Residual DNA does not automatically create an infringement case
An importer or processor facing a claim based only on DNA detection can point to the functional requirement. The patent owner must connect the detected sequence to the patented activity in the relevant material, not merely establish that a fragment survives processing.
The ruling is not a blanket exemption for processed products
The decision does not say that every processed product containing genetic material is outside patent law. The result depends on the patent claims, the identity and condition of the material, and whether the claimed function is actually being performed. A different process could leave biological material active, or a different patent could claim a function that remains relevant after processing.
Import cases remain fact-specific
The case involved soy meal entering the Netherlands, a sequence associated with glyphosate resistance, and the interpretation of an EU directive. It does not automatically control disputes in countries applying different statutes, nor does it answer every question about products that contain, reproduce, express or use patented genetic information.
A practical framework for analyzing a similar dispute
Businesses assessing a DNA-related patent allegation can organize the analysis in the following order. The steps do not replace advice from a patent professional, but they identify the factual questions that the CJEU’s reasoning makes central.
- Read the patent claim, not just the sequence report. Identify the precise function the patent protects. In Monsanto’s case, the relevant function was glyphosate resistance in a soybean plant.
- Identify the material tested. Establish whether the sample is a living organism, a reproductive part, a processed ingredient, a feed component or another form of biological material.
- Separate detection from activity. A laboratory result showing residual DNA answers whether genetic material is present. It does not by itself show that the sequence is expressing the patented trait.
- Ask whether the function is occurring now. Determine whether the sequence is performing its claimed role in the material as it exists at the time of the alleged infringement.
- Reject purely hypothetical transformation scenarios. The possibility that the sequence could work after being introduced into another organism is not the same as actual function in the current material.
- Check the applicable law and territory. Article 9 of Directive 98/44/EC governed the legal question referred to the CJEU. National patent law, the patent’s territorial scope and later legal developments may affect a present dispute.
Common misunderstandings about the decision
“The Court invalidated Monsanto’s DNA patent.”
No. The Court addressed whether the patent could be relied on against soy meal under Article 9 in the circumstances described. It did not cancel the patent or hold that the underlying DNA sequence was unpatentable.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware match“Any DNA in food is legally irrelevant.”
No. The judgment concerned residual DNA in processed soy meal and the particular function claimed. Other genetic material may remain functional, may be covered by different claims, or may raise questions under other legal rules.
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“A positive DNA test proves infringement.”
No. The test established the presence of characteristic DNA. The Court required an additional functional connection between that information and the patented invention in the material where it was found.
“The sequence’s ability to work in a new plant is enough.”
No. The Court expressly rejected that future-function approach. The sequence would need to be introduced into the other plant and perform its function there.
“The ruling applies worldwide.”
No. The judgment interpreted EU law, specifically Article 9 of Directive 98/44/EC, in a European patent dispute. Other jurisdictions may use different statutory language, doctrines and precedents.
Limits of what this 2010 ruling resolves
The decision supplies a clear principle but not a universal answer to every biotechnology patent dispute. A later case may involve a different claim, a living or viable organism rather than dead meal, a process that preserves biological activity, or a jurisdiction outside the EU. The scope of a patent can also depend on how its claims define the sequence, the host organism and the function.
The official CJEU press release is a summary of the judgment. Anyone handling a live dispute should examine the complete judgment, the patent claims, the evidence about the material’s biological activity and the law in the relevant country. The 2010 ruling should be treated as an interpretation of Article 9 in its own factual and legal setting, not as a substitute for that case-specific analysis.
Why the phrase “DNA must do its job” is useful
The phrase is a practical shorthand for the distinction the Court drew. Genetic information can remain physically present after processing while losing the biological role that made it patent-relevant. Patent protection under the provision at issue follows the role, not detection alone.
For the Argentine soy meal, the decisive gap was between a living soybean that used the sequence to resist glyphosate and processed meal that merely retained fragments of the sequence. Because the DNA no longer performed that function in the meal, Monsanto could not rely on Article 9 to block its marketing on that basis.
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