Do Patents Expire In The UK?

If your business relies on a new product, process or piece of tech, patents can be a powerful way to protect your edge and attract investment.

But there’s a catch that many founders miss: patents don’t last forever. They can lapse early if you don’t maintain them, and even the longest-lived patents eventually expire and fall into the public domain.

In this guide, we answer the big question “do patents expire?” from a UK business perspective, and set out clear, practical steps to manage patent lifecycles so you stay protected from day one and beyond.

Do Patents Expire In The UK?

Yes. In the UK, standard patents granted under the Patents Act 1977 have a maximum term of 20 years from the filing date, provided you pay renewal fees on time. When a patent expires, the invention enters the public domain, which means anyone can use it without a licence.

That 20-year headline term is the starting point, but there are nuances that matter for businesses planning product lifecycles, licensing, investment or exit. Let’s break those down.

How UK Patent Terms Work (And The Main Exceptions)

Understanding the timeline helps you plan R&D, launch and monetisation strategically.

The Core Timeline

• Filing: You file a UK patent application with the UK Intellectual Property Office (UKIPO). You can file directly or claim priority from an earlier filing (e.g. a first filing in the UK or abroad within 12 months).
• Publication: Applications are typically published 18 months from the earliest filing/priority date. Publication doesn’t equal protection, but it does put your invention into the public domain (disclosing it) and starts deterring competitors.
• Examination and Grant: After examination, successful applications proceed to grant. Your enforceable rights begin at grant, but you can claim damages back to publication in limited circumstances.
• Expiry: The patent can run to a maximum of 20 years from the filing date if you pay annual renewals from year 5 onwards. At expiry, protection ends.

Supplementary Protection Certificates (SPCs)

There’s no general “patent term extension” in the UK. However, in specific sectors, you may be able to extend protection:

• Medicinal and Plant Protection Products: An SPC can add up to 5 extra years of protection to compensate for regulatory delays, potentially plus a 6‑month paediatric extension for certain medicines.
• Scope: SPCs protect the authorised product (not necessarily the full breadth of the original patent claims) and have strict eligibility criteria and deadlines.

If you operate in life sciences or agrochemicals, build SPC assessment into your regulatory strategy early. Missing SPC filing windows can mean losing years of exclusivity.

What About Software And Apps?

Software “as such” isn’t patentable in the UK, but many software-enabled inventions are patentable if they provide a technical contribution (for example, improving how a computer operates). If you’re exploring whether you can patent your app, get specific advice before publishing your idea or shipping code-public disclosure can jeopardise patentability in many jurisdictions.

Brexit And The Unitary Patent

The new Unitary Patent and Unified Patent Court do not cover the UK. For protection here, you still need a UK patent (via UKIPO) or a European patent validated in the UK. The 20‑year term and UK renewal regime apply either way.

Renewals, Lapse And Restoration: Keeping Your Patent Alive

Even strong patents can die early if you miss admin steps. That’s avoidable with the right systems.

Renewal Fees

• Timing: UK renewal fees fall due on the 4th anniversary of the filing date (payable at the end of year 4) and annually thereafter up to year 20.
• Escalating Costs: Fees generally increase each year, reflecting the growing value of a mature patent.
• Grace Periods: There’s a 6‑month late period (with surcharges). If you still don’t pay, the patent will lapse.

Accidental Lapse And Restoration

If your patent lapses for non-payment, you may be able to restore it by proving the failure to renew was unintentional and by meeting strict deadlines (generally within 13 months of the missed due date). Restoration isn’t guaranteed-assume it’s a safety net, not a strategy.

Portfolio Hygiene For SMEs

As you grow, you may hold several patents and applications across markets. Put in place:

• A central docketing system with renewal reminders and backup contacts.
• A decision framework to prune patents that no longer support revenue (for example, if a product is discontinued) and to double down where protection is critical.
• Clear internal ownership documents-particularly if inventors include employees and contractors-so you can renew and enforce without disputes.

If contractors contribute to inventions, make sure your Consulting Agreement expressly assigns IP to your company and waives moral rights where appropriate. For employees, ensure your Employment Contracts include robust invention assignment clauses as well.

Planning For Expiry: Strategies To Stay Competitive

Eventually, even well-maintained patents expire. Smart businesses plan for the “post-patent” world well in advance.

Stage Your Innovation

• Pipeline R&D: While your first patent protects Version 1.0, continue investing in technical improvements. Subsequent patents on genuine innovations can extend your competitive edge without “evergreening” inappropriately.
• Consider Different Claim Angles: Process, device, system, and use claims may give complementary coverage. Always assess novelty and inventive step honestly-weak patents are expensive to keep and easy to attack.

Build Brand Equity You Can Renew Forever

Patents expire, but trade marks can be renewed every ten years indefinitely if used correctly. Strong branding means that even when the underlying invention is free to copy, customers still seek out your name, logo and get-up. If brand protection is part of your strategy, register your trade mark early in the markets that matter.

Leverage Other IP Rights

• Copyright and Designs: Depending on your product, copyright or registered designs may protect code, artwork or product appearance. These rights have different terms and can outlast or complement patents.
• Trade Secrets: Keep key know‑how confidential and accessible only on a need‑to‑know basis. Use NDAs and access controls. Trade secrets don’t have a fixed expiry-they last as long as the information remains secret and valuable.

If confidentiality is central to your edge (for example, formulas, data sets, manufacturing tolerances), use a well‑drafted NDA for staff, suppliers and prospective partners, and ensure your operational security matches your paperwork.

Competitive Freedoms At Expiry

When a competitor’s patent expires, you may be able to enter the market with similar functionality. Before you act, check:

• Secondary Patents: Improvements, formulations, or manufacturing methods may still be protected.
• Regulatory Exclusivities: Medicines and some regulated products carry non‑patent exclusivities that can delay generic/biosimilar entry.
• Other IP: Brand, designs and copyright can still bite even when a patent expires.

Communicate Clearly With Investors And Licensees

Investors and commercial partners will want clarity on how long exclusivity realistically lasts, where, and on what terms. Keep a clean, dated record of filings, grants, renewals and licensing deals to support due diligence.

Licensing, Assignments And Contracts To Manage Patent Value

Commercial agreements determine how value flows from your patents today-and how it evolves as patents approach expiry.

Patent Licensing

Licences can be exclusive, sole or non‑exclusive; field‑restricted; territory‑limited; and royalty‑bearing or royalty‑free. Make sure the agreement addresses what happens as patents expire, including:

• Royalty Step‑downs: For example, reducing rates as the portfolio shrinks or post‑expiry royalties that switch to a trade secret or know‑how licence where lawful.
• Milestone Triggers: Tying payments to grant, SPC approval or market entry.
• Improvements: Who owns them, and are they cross‑licensed?

Be clear on licensed rights and the non‑patent rights that sit alongside them (confidential know‑how, data sets, documentation). For structure and obligations, align the commercial terms with a tailored IP Licence, and consider the practical differences between assignment and licensing explained in our overview of IP licensing.

Assignments (Transfer Of Ownership)

Sometimes it makes sense to transfer (assign) patent ownership-for example, into a group IP holding company, as part of a sale, or to clean up title from inventors.

• Timing: Assign early and record promptly at UKIPO to preserve priority in enforcement and to avoid disputes.
• Scope: Ensure assignments cover applications, divisions, continuations and foreign counterparts, plus all related know‑how and rights to sue for past infringements where relevant.

Use a robust IP Assignment that captures the entire portfolio and aligns with investor or buyer expectations.

Contracting With Developers And Partners

Make sure collaboration, consulting and manufacturing agreements include clear IP ownership, confidentiality and background/foreground IP provisions. This avoids painful arguments about who owns what when you go to file or enforce. If you’re working with external developers, start with a proper Consulting Agreement and keep invention disclosures organised.

Tying It All Together With An IP Strategy

Patents are just one tool. Map out which rights you’ll use to protect which assets, when they start and when they end. It can help to run an IP lawyer consult to test assumptions, align your contracts and ensure your registration, renewal and enforcement plans are realistic for your stage and budget.

Do Patents Expire? Yes-So Use The Whole IP Toolkit

It’s worth stepping back and looking at the full mix of intellectual property available to you. Different rights last for different periods and protect different things:

• Patents: Up to 20 years (plus possible SPCs), protecting inventions (products, processes) that are new, inventive and industrially applicable.
• Trade Marks: Renewable every 10 years indefinitely, protecting brand names, logos and more-file for your core marks via a trade mark registration.
• Copyright: Automatic protection for original literary, artistic and software works. Duration depends on the work type (often life of the author plus decades).
• Designs: Registered designs can protect the look of a product for up to 25 years (with renewals every 5 years).
• Trade Secrets: No fixed term if they remain confidential and valuable.

Pulling these together into a joined‑up plan gives you resilience as one right expires and another takes over. If you’re unsure what you can protect, it can help to review common categories of intellectual property and then prioritise registrations and contracts that match your commercial roadmap.

Practical Pitfalls To Avoid

• Disclosing Too Early: Publicly revealing an invention before filing can destroy patentability in many jurisdictions. Use NDAs and file first.
• Missing Renewal Dates: A simple calendar error can cost you your monopoly. Use redundant reminders and assign responsibility.
• Unclear Ownership: If inventors are contractors, your company may not own the rights by default. Fix this in contracts up front.
• Assuming Post‑Expiry Royalties Are Automatic: Royalty obligations need careful drafting, especially after expiry. Structure your licence to reflect lawful value (for example, know‑how).
• Ignoring “Shadow” IP: Even if a patent expires, trade marks, designs and copyright can still block you. Do a freedom‑to‑operate check before entering a market.

Key Takeaways

• UK patents do expire-standard patents last up to 20 years from filing if you pay renewals; limited extensions (SPCs) exist for certain regulated products.
• Renewals matter: set up robust docketing and decision processes so valuable patents don’t lapse by mistake, and prune those that no longer support revenue.
• Plan early for the post‑patent world: build brand equity with trade marks, keep critical know‑how as trade secrets using an NDA, and keep innovating to protect genuine improvements.
• Use contracts to lock in value: tailor your IP Licence terms for expiry scenarios, record assignments with a proper IP Assignment, and ensure contractor and collaboration agreements capture IP clearly.
• Think in portfolios, not single rights: patents, designs, trade marks and trade secrets work together to protect your products across their lifecycle.
• If you’re unsure whether your innovation is patentable (especially in software), get specific advice before public disclosure-our overview on when you can patent your app is a helpful starting point.

If you’d like help building or auditing your IP strategy-whether that’s patents, licensing, trade marks or confidentiality-you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no‑obligations chat.