Patents are a cornerstone of innovation across all technical fields, providing inventors with a temporary right to exclude others from using their inventions in exchange for public disclosure.
In the life sciences, however, patents take on a particular strategic significance. They are not only tools for legal protection but also critical business assets. Strong patent portfolios attract investment, safeguard years of costly research, and create the framework for translating scientific discoveries into marketable therapies, diagnostics, and platforms.
Yet, patenting in this field is far from straightforward. Unlike mechanical or software inventions, life sciences innovations sit at the intersection of biology and technology. They often involve living systems, naturally occurring molecules, or complex biological pathways, features that bring unique challenges compared to more “deterministic” fields like mechanics or electronics.
If you have ever compared a pharmaceutical patent to one for a mechanical device, you may have noticed a few striking differences:
- Pharmaceutical patents are typically much longer.
- They include extensive experimental data.
- They tend to contain more claims.
There are sound reasons for these differences. This article aims to explain some of them, as well as to highlight why having a solid intellectual property (IP) strategy from an early stage is crucial for any life sciences company.
Why Life Sciences Patent Applications Are So Expansive
Life sciences patent applications are rarely short documents. A description under 50 pages is unusual, while exceeding 100 pages is common. This length is not padding but necessity.
Unlike mechanical inventions, where components and functions can be depicted and explained concisely, biological inventions are variable and context dependent. Molecules may have thousands of potential variants, and their function often depends on the biological environment. Patent applications in this field must anticipate and encompass this complexity.
Take antibodies as an example. These Y-shaped proteins, composed of four amino acid chains folded into a specific 3D structure, are central to many therapeutics and diagnostics.
To claim and protect an antibody, one must first establish function:
- Does it treat a disease?
- Can it deliver a drug to a specific target?
- Can it detect a biomarker?
Simply describing the molecule is insufficient; without a demonstrated effect, it is deemed a discovery rather than an invention, and thus not patentable.
This is where experimental data becomes indispensable. While a clear schematic might suffice in electronics or mechanical engineering, life sciences inventions require evidence, for instance data obtained in cell cultures (in vitro) or in animals (in vivo), to prove that the invention works as claimed.
To obtain broader protection beyond a single antibody sequence, additional data is needed to show that variants or mutations retain the same function as the original antibody. If such data is present, it is justifiable to include these variants/mutations in the scope of protection, however not all possible variations/combinations need to be tested. It is possible to include variants and mutations that have not been tested, as long as it can be made plausible that these variants and mutations would still work.
In addition, it is not going to be sufficient to simply describe the antibody’s characteristics and its function, it will also be necessary to address the uses of the antibody. For instance, formulations with the antibody, compositions, how to make the antibody, diseases one may be able to target with the antibody, etc.
Consequently, life sciences patent descriptions usually include many pages of detailed embodiments supported by experimental data.
The Claims
If the Description provides the foundation, the Claims define the territory. In life sciences patent applications, the claim strategy is both broader and more complex than in many other technical fields.
While mechanical patents usually rely on a limited set of claim categories, such as product, process, or method claims, life sciences patents often have many more claim categories including compound claims, composition and formulation claims, method for making, kits, and, most distinctively, medical use claims.
Medical use claims
Medical use claims are a special type of claim of which more than one can be present in a patent. They can be drafted in several forms:
- First medical use: “X for use as a medicament.”
- Second medical use: “X for use in the treatment of disease Y.”
- Further medical use: Subsequent uses beyond the first and second, such as new therapeutic indications.
However, the accepted claim formats vary across jurisdictions.
In Europe, the “purpose-limited product claim” is the only format that is accepted:
“X for use as a medicament” (first medical use)
“X for use in the treatment of Y” (second and further medical use)
But in the US, you have to use the “method of treatment claim”, which is not accepted in Europe:
“Method of treating disease Y in a patient by administering X”
Then, in China one has to use so-called “Swiss-type claims”:
“Use of X in the manufacture of a medicament.” (first medical use)
“Use of X in the manufacture of a medicament for the treatment of disease Y.” (second and further medical use)
Most jurisdictions will accept one of these three formats (or combinations thereof) for medical use claims, but there are two jurisdictions that are exceptions.
Firstly, Japan. In Japan, first medical use claims need to be formulated as a product claim:
“A drug comprising X”.
While second and further medical use claims are formulated as a pharmaceutical composition claim:
“Pharmaceutical composition for the treatment of disease Y, comprising X.”
Swiss-type claims are also allowed for second and further medical uses, but they may have a more limited scope in Japan than the claim example here above.
Secondly, India. India is a very difficult country especially for pharmaceutical inventions. India does not allow any medical use claims. This means that in India you can only protect the compound itself, and it is currently not possible to protect any therapeutic application involving treatment. Claim scopes in India are therefore broad for newly discovered compounds, but almost non-existent for new uses of existing compounds. There are some ways to go around this by claiming specific compositions or formulations, but this is a much more narrow claim scope than in other jurisdictions.
Because of these variations in format, claim sets in life sciences patents can become extensive. To ensure global protection, applications often include multiple medical use claim formats within their claim set or at least ensure that the Description provides basis for them.
Adding to the complexity, many patent offices charge excess claim fees beyond a certain number of claims, making claim management an important strategic and cost consideration.
Special compound claims
There are two additional special types of compound claims that can be used in life sciences patent applications:
- Biotechnology claims, used when a biological material (e.g. a DNA sequence, microorganism, or cell line) is defined by reference to a deposit at a recognized depository such as the ATCC.
- Product-by-process claims, which define a product in terms of the process used to make it when the product itself cannot be adequately described by its features.
A single life sciences patent application might therefore include:
- A compound claim describing the molecule’s structure.
- A process claim for making it.
- One or more medical use claims.
- A composition or formulation claim.
- A kit claim.
Each of these independent claims will most likely have at least 1 or 2 dependent claims to provide further details/fallbacks, which further expands the claim set. Additionally, these claims (and possibly even more fallback options) are always included in the Detailed Description as well.
Conclusion
Patent applications in the life sciences are complex, data-intensive, and strategically nuanced. Strong patents in this field share three essential qualities:
- Data-driven: Without experimental evidence, even a promising discovery cannot qualify as an invention.
- Comprehensive: Broad protection requires disclosure of variants, uses, and fallback positions.
- Globally strategic: Claim formats that succeed in one jurisdiction may not be accepted in another; careful drafting ensures flexibility and protection worldwide.
In short, drafting life sciences patent applications is both a scientific and a legal exercise. Investing early on in a solid patent portfolio will ensure long-term success for a company operating in the field of the life sciences.
At IFORI we use our deep understanding of technology and patent law to help you build the patent portfolio that aligns with your business strategy to support the growth of your company to market entry and beyond. Feel free to reach out to us for a no-obligation introductory consultation or any patent-related questions you may have.
