Bilski v. Kappos
The Court unanimously ruled that a proposed patent on a method for hedging energy-price risk was not patentable because it amounted to an unpatentable abstract idea, not a genuine invention.
In doing so, the Court rejected the lower appeals court's rule that an invention must be tied to a machine or physically transform something to count as a patentable 'process,' while also declining to say business methods can never be patented — leaving the boundaries of what can be patented unsettled for future cases.
“The machine-or-transformation test is not the sole test for deciding whether an invention is a patent-eligible “process.””
The Court's central holding rejecting the lower court's exclusive test for patentability.
How it got here: A patent examiner and the Patent Office's appeals board rejected the application; the Federal Circuit, sitting en banc, affirmed using a new exclusive test, and the inventors asked the Supreme Court to review that test.
The Case in Depth
What happened
Two inventors sought a patent for a method that would let buyers and sellers of commodities like energy hedge against the risk of price swings, by pairing consumers who wanted stable prices with counter-parties willing to take the opposite risk. The application described the concept as a series of steps and also reduced it to a mathematical formula, along with sample applications to the energy industry.
The question before the Court
Could two businessmen patent a method for hedging against the risk of price swings in the energy market, or was it just an unpatentable idea about how to do business?
Why it matters
Businesses and inventors seeking patents on financial products, software, and other non-machine-based methods gained some flexibility, since the machine-or-transformation test is no longer the only way to qualify. But because the Court left open exactly what does qualify, companies and patent examiners continued to face uncertainty over which business and computer-related methods can be patented.
What changes now
The ruling is a final decision on the merits, and the patent application remains rejected. The Federal Circuit and patent examiners must now evaluate future 'process' patent applications, including business methods and software, without relying solely on the machine-or-transformation test, but the Court did not supply a full replacement test, leaving lower courts and the Patent Office to work out the details case by case.
What this does not decide
The Court did not decide whether business methods in general are patentable, nor did it endorse or reject any specific alternative test for identifying a patentable 'process.' It also did not rule on the patentability of software, medical diagnostics, or other Information Age technologies, expressly declining to comment on those areas.
Concurrences and dissents
Concurrence — Justice Stevens
Justice Stevens agreed the application should be rejected but for a different, narrower reason: he would have held that business methods, as a category, are not patentable processes at all, based on centuries of legal history showing methods of conducting business were never treated as patentable. He warned that the majority's broader language could cause confusion in future cases.
Concurrence — Justice Breyer
Justice Breyer agreed with Stevens that business methods are not patentable processes and joined that opinion in full. He wrote separately to highlight four points he believed the whole Court agreed on, including that the machine-or-transformation test remains a useful and important clue even though it is not the only test.
How the Court got there
The legal reasoning, step by step
- The Court examined the four categories of patentable subject matter in the Patent Act — processes, machines, manufactures, and compositions of matter — and noted that courts have long recognized three exceptions: laws of nature, physical phenomena, and abstract ideas, which cannot be patented no matter which category they might otherwise fit.
- The Federal Circuit had ruled that an invention can only count as a patentable 'process' if it is tied to a machine or transforms an article into a different state — the so-called machine-or-transformation test. The Court held that this test, while a useful and important clue, cannot be the sole and exclusive way to identify a patentable process, because nothing in the statute's text requires it.
- The Court also rejected the argument that business methods can never be patented as a category, reasoning that the term 'method' in the statute's definition of 'process' is broad enough, at least textually, to include some ways of conducting business, and that a separate federal law recognizing a defense to business-method patent infringement suggested Congress assumed such patents could exist.
- Having cleared away both categorical bars, the Court still had to decide whether this particular application was patentable. Applying its earlier decisions on unpatentable abstract ideas, the Court found that the core concept of hedging risk is itself an abstract idea, and that limiting it to the energy market or reducing it to a formula did not change that.
- Because the underlying concept of hedging was an abstract idea rather than a genuine invention, the remaining, broader claims applying that same concept to energy markets failed for the same reason, since attaching an abstract idea to one particular field of use does not make it patentable.
Doctrinal impact
Cases affected by this decision
Limits Cochrane v. Deener (94 U. S. 780)
The Court said later cases rejected treating this 1877 decision's transformation language as an exhaustive or exclusive test.
Reaffirms Gottschalk v. Benson (409 U. S. 63)
The Court relied on this case's rule that abstract ideas and mathematical formulas cannot be patented.
Reaffirms Diamond v. Diehr (450 U. S. 175)
The Court relied on this decision's approach to evaluating inventions that use mathematical formulas within larger processes.