UK Patents: A Practical Guide to Protecting Your Inventions | LegalDocuments.co.uk

Overview

A patent is a legal monopoly granted by the state. In the UK, it gives the patent holder the exclusive right to exploit an invention commercially for up to 20 years from the filing date, provided renewal fees are paid each year after the fifth anniversary.

The framework sits within the Patents Act 1977, which sets out what can be patented, how applications are examined, and how disputes are handled. Patents are administered by the Intellectual Property Office (IPO), an executive agency of the Department for Science, Innovation and Technology.

Not everything qualifies. Patents protect technical inventions, products, processes, machines, chemical compositions, and the like. They don't protect business methods as such, mathematical formulas, artistic works, or computer programs in isolation, although software linked to a technical effect may be patentable in some circumstances.

To be granted, an invention must be new anywhere in the world, must involve an inventive step that wouldn't be obvious to someone working in the field, and must have a practical industrial use. Once granted, the patent owner can license, sell or enforce it through the courts.

Key steps

1. Keep it confidential and run a search. Before you do anything else, stop telling people about your invention publicly, any disclosure before filing can destroy novelty. Then search existing patents and technical publications to see whether your idea is already out there. The IPO's online register and free databases such as Espacenet are reasonable starting points, though a professional search gives you a more reliable picture.
2. Prepare a patent specification. This is the technical heart of your application. It needs to describe the invention clearly enough that someone skilled in the relevant field could replicate it, and it must include claims that define precisely what you want to protect. Drafting claims is genuinely difficult, claims that are too narrow give weak protection, while claims too broad will be rejected during examination.
3. File the application with the IPO. You can file online through the IPO's website. The filing date is critical because it establishes priority over later applicants, so many inventors file early to lock in that date and refine details afterwards. Filing fees apply and are payable at various stages, check the IPO website for current amounts before you submit.
4. Request search and substantive examination. Within twelve months of filing, you must request a search so the IPO can identify prior art that may affect novelty or inventiveness. A substantive examination follows, where an examiner assesses whether your invention meets the legal criteria. You'll usually need to respond to objections and may need to amend the claims to get the application accepted.
5. Publication, grant and renewal. Around eighteen months after filing, your application is published, making the technical details public. If examination is successful, the patent is granted and entered on the register. From then on you'll need to pay annual renewal fees to keep the patent in force, and it's down to you, not the IPO, to monitor for infringement and enforce your rights.