PHARMACEUTICAL IP

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    • Technologies
      • Pharmaceuticals
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      • AI drug discovery
    • Our clients
      • Biotech
      • CROs and CMOs
      • Established pharma
      • International IP counsel
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      • Start-ups
      • Universities
  • Fractional IP counsel
    • Biotech
    • CROs and CMOs
    • Established pharma
    • International IP counsel
    • Investors
    • Start-ups
    • Universities
  • Evolve AI
  • Technologies
    • Pharmaceuticals
      • Dosing regimens
      • Formulations
      • Life cycle management
      • New indications
      • Platform technologies
    • Biologics
      • Antibodies
      • Antibody-drug conjugates (ADCs)
      • T cell engagers (TCEs)
    • Cell & gene therapy
      • CAR-T cell therapies
      • Gene therapies
      • In vivo CAR-T
      • Lipid nanoparticles (LNPs)
      • Macrophages (CAR-M)
      • mRNA therapeutics
      • Regenerative cell therapies
    • AI drug discovery
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Patent drafting

A pharmaceutical patent is a global asset. A product’s loss of exclusivity is decided country by country, and every major market applies its own patent law. At Evolve, we draft patent applications for worldwide protection, taking account of US, European and other key jurisdictions’ law from the first filing, so that one application can support strong claims in every market that matters.

Why global drafting matters

Patents are the main source of market protection for a medicine. The loss of exclusivity date drives revenue forecasts, clinical investment, deal terms and royalties, and it is set separately in each country (Evolve Insights). An application drafted with only one patent system in mind can leave gaps in key markets, and those gaps are usually found when it is too late to fix them. We draft so that the claims cover the product as it will be developed, approved and marketed, in every territory you need.

Meeting US and European requirements together

The US and Europe test the same application in different ways. In the US, claims must satisfy the written description and enablement requirements, and the courts have applied these strictly to broad genus, functional and platform claims in the life sciences (Evolve Insights). At the EPO, the application must make the claimed technical effect credible on the filing date, and later data cannot fill a gap in the application as filed (Evolve Insights). We draft claims and supporting disclosure that satisfy both systems, with a layered claim set running from broad claims down to the lead candidate.

Definitions and claim construction

Definitions in the description can narrow claims unexpectedly, and courts and patent offices do not always read them the same way. In Alnylam v Moderna, a definition in the description narrowed the US claims (Evolve Insights), and in Wyeth v AstraZeneca a definition contributed to an enablement problem (Evolve Insights). With the EPO’s Enlarged Board now confirming the role of the description in claim interpretation and description amendments (Evolve Insights), we choose and define terms so that they work under each system.

Building in basis for future amendments

Claims will need to change during prosecution, opposition and litigation, and the EPO’s test for added matter is one of the strictest in the world (Evolve Insights). We build in clear basis for fallback positions, including combinations of preferred features and specific embodiments, so that you can amend in Europe, the US and elsewhere without losing your filing date.

Supporting the claims with data

In pharma and biotech, patentability increasingly turns on data. We advise on which experiments and results to include, how to present them, and when it is worth waiting for more data before filing, balancing the strength of the data against the risk of being overtaken. The US gives a one-year grace period for your own disclosures, but Europe does not, so filing before any publication remains essential.

Patent term and regulatory exclusivity

Good drafting also looks ahead to the end of a patent’s life. Patent term extensions and SPCs depend on the marketing authorisation, and the rules for them differ from country to country. We draft with these in mind, so that your claims can support term extensions for the approved product wherever possible, and we keep track of changes to the regulatory framework that may affect your period of market protection.

Technology specialists

A patent application can only be as good as the drafter’s understanding of the science. Knowing what the data really shows, which variations a competitor could make and what the prior art is likely to teach is what turns an invention into claims that are both broad and defensible. Our attorneys have scientific backgrounds in the fields they draft in, and many have worked in research or in-house at pharma and biotech companies. That means we can engage directly with your scientists, spot the inventive contribution quickly and anticipate the objections an examiner or opponent will raise.

We draft across small molecules, biologics and antibodies, cell and gene therapies, nucleic acid medicines, formulations, dosage regimens, medical uses and manufacturing processes, including sequence listings and Markush claims.

Pharmaceuticals
Biologics
Cell & gene therapy
AI drug discovery

Fractional IP counsel

Our fractional IP counsel model places a named senior patent attorney inside your team as your head of IP, deciding what to file, when and where, and working with your scientists to capture inventions as they arise.

Why fractional IP counsel for patent drafting? The best applications are drafted by people who know which inventions are worth filing and how the claims will later be used. Our patent directors have built portfolios from inside pharma and biotech companies, and bring the real-world industry experience that you only get working in-house to the decision of what to file and when. Our drafting team, supported by Darwin and Gilbert, then turns that into strong applications quickly, which a consultant working alone, or a traditional firm without that in-house view, struggles to match. Every filing is planned with a global strategic approach.

Fractional IP counsel

Contact us today to discuss your next patent application.

Evolve AI

Darwin: Patent drafting

Darwin drafts the claims, the specification and the sequence listing alongside the attorney, one decision at a time.

Drafting a pharma application means working out what the data will support before you decide what to claim. Darwin is built around that order of events, for small molecules, biologics and cell and gene therapy. It prepares:

  • Claims: from the data, with the attorney choosing the claim format and the drug definition at each step
  • Claim iteration: amendments added to an existing set without disturbing it, and the numbering tracked
  • Specification: each section written from the claims and the data, with the figures pulled out and labelled
  • Sequence listing: a compliant ST.26 file produced in code rather than by a language model, because the listing has to match the data exactly

Gilbert then reads the whole application through. The attorney settles what the data supports and what the business needs the patent to do. See how we work with start-ups and established pharma, or read how to read a biotech patent.

More about Darwin
Darwin

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Stack of gold plates fanning open around a turquoise light on dark blue, Evolve abstract article image
Stack of gold plates fanning open around a turquoise light on dark blue, Evolve abstract article image

The enablement paradox and the danger of definitions (Wyeth v AstraZeneca)

  • 6th October 2026
The Federal Circuit’s decision in Wyeth v AstraZeneca (No. 2024-2325) applied the enablement test to a dose invention. The case is an interesting contrast to the other recent case to apply enablement to a method of treatment claim, Teva v Eli Lilly (Evolve Insights).
Twisting strand of gold beads with a turquoise section on dark blue, Evolve biotechnology image
Twisting strand of gold beads with a turquoise section on dark blue, Evolve biotechnology image

Sequence identities and functional definitions – where is the limit? (T 0137/24)

  • 2nd June 2026
Biotechnology patents often rely on defining protein and nucleic acid features by their sequence identity. However, it is often not necessary to define the exact sequence, but instead to define the sequence according to a limit of sequence identity, e.g. a sequence having a 90% sequence identity to a specified sequence.
Stack of gold plates fanning open around a turquoise light on dark blue, Evolve abstract article image
Stack of gold plates fanning open around a turquoise light on dark blue, Evolve abstract article image

Strict US written description and enablement requirement applied to ADCs and platform inventions (Seagen v Daiichi Sankyo)

  • 14th December 2025
The recent decision of the US Court of Appeals for the Federal Circuit in Seagen v. Daiichi Sankyo overruled the jury decision in the District Court to find an ADC linker platform patent invalid for both lack of written description and enablement. 
Gold strands braiding into one cord with a turquoise join on dark blue, Evolve abstract article image
Gold strands braiding into one cord with a turquoise join on dark blue, Evolve abstract article image

EPO pharma case law trends 2025: Clinical inventions

  • 26th November 2025
The law in the pharma sector field is also constantly evolving. Understanding the case law trends when drafting, prosecuting and defending these cases is therefore paramount. In our second post on EPO pharma case law trends in 2025 (see Evolve Insights), we review the most impactful decisions of the year relating to clinical-stage inventions. 
Nested gold frames with a glowing turquoise centre on dark blue, Evolve abstract article image
Nested gold frames with a glowing turquoise centre on dark blue, Evolve abstract article image

The unforgiving gold standard: Why deleting a feature can add matter at the EPO (T 0422/23)

  • 30th September 2025
Addition by subtraction: How deleting a feature from a patent claim can fall foul of the EPO’s unforgiving rules on added matter.
Twisting strand of gold beads with a turquoise section on dark blue, Evolve biotechnology image
Twisting strand of gold beads with a turquoise section on dark blue, Evolve biotechnology image

Alnylam v. Moderna and the judicious use of definitions: The European perspective

  • 10th June 2025
When drafting a patent, seemingly innocuous “boilerplate” definitions in the description can drastically narrow your claims, as demonstrated by the Alnylam v Moderna case in the US, highlighting the critical need for precise language to protect your invention.
Twisting strand of gold beads with a turquoise section on dark blue, Evolve biotechnology image
Twisting strand of gold beads with a turquoise section on dark blue, Evolve biotechnology image

Alexion’s Soliris sequence error saga (Alexion v Samsung Bioepis [2025] EWHC 1240)

  • 4th June 2025
Beware! The recent Samsung v Alexion UK High Court decision reveals that even a single-letter error in patent sequence data, coupled with vague descriptive language, can invalidate your claims and lead to costly legal battles.
Stack of gold plates fanning open around a turquoise light on dark blue, Evolve abstract article image
Stack of gold plates fanning open around a turquoise light on dark blue, Evolve abstract article image

Beware of boilerplate: Practical lessons for patent drafting from G1/24 (Claim interpretation)

  • 11th April 2025
Originally posted on IPKat. Following the high profile hearing last month, we are now waiting for the written decision of the Enlarged Board of Appeal (EBA) in G 1/24. Readers can catch-up on the full background to the case here. There is also still plenty to discuss while we wait.  Fractional IP counsel G 1/24 relates to…
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