Utility Patent vs Design Patent: Differences, Costs and Which to File
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TL;DR: A utility patent protects how your product works. A design patent (in the EU, a registered design) protects how it looks. Design protection is faster and cheaper but easier to get around; a utility patent is slower and costlier but stops copies of the function. If both the function and the look sell your product, file both, and do not show it in public before you file.
A note on terms
“Utility patent” and “design patent” are US terms. In Europe and Lithuania, a utility patent is simply a patent for an invention, and the appearance of a product is protected by a registered design, not a patent. Do not confuse a utility patent with a utility model: that is a separate, shorter right that only some European countries, such as Germany, offer. Lithuania has no utility model protection.
Key points
- Utility patent = function, design = appearance. Many products need both.
- In Europe and Lithuania, appearance is protected by a registered design, not a patent. “Design patent” is a US term.
- Design protection is faster and cheaper. An EU design costs from €350 in official fees and is often registered within days or weeks; a US utility patent takes about 2–3 years.
- Do not show the product in public before you file. The EPO has practically no grace period; for designs in the EU and the US it is 12 months.
- Priority for designs abroad lasts only 6 months, for patents 12 months.
- The most common mistake is assuming a design registration protects a technical solution.
Utility patent vs design patent at a glance
| Utility patent | Design patent (US) / registered design (EU) | |
|---|---|---|
| What it protects | Utility patent How an invention works: its structure, mechanism, method or composition |
Design How a product looks: shape, contours, lines, colours, texture, surface decoration |
| Examples | Utility patent A new vacuum cleaner separation system, a battery cooling method, a drug formulation, a machine part that cuts wear |
Design A bottle shape, the front face of a phone, furniture, jewellery, packaging, app icons and screen layouts |
| When to choose it | Utility patent Competitors could copy the function even if the product looked different |
Design Customers choose the product by its look, and a look-alike would take your sales |
| Filing requirements | Utility patent Detailed description, claims, drawings and an abstract. The description must let a skilled person reproduce the invention. Must be new, inventive (non-obvious) and industrially applicable |
Design Drawings or photographs from several views and a product indication. Must be new and, in the EU, have individual character; in the US, ornamental and non-obvious. The drawings define the scope |
| Examination | Utility patent Full search and examination at the USPTO and the EPO. Lithuania grants national patents without substantive examination (a registration system), so the patent’s validity is not tested until it is challenged. An optional EPO search report is available through the VPB. |
Design USPTO examines design applications. EUIPO only checks formalities, so a weak design can be registered and later cancelled |
| Typical timeline | Utility patent US: about 2–3 years to grant, longer in software. EPO: often 3–5 years. Lithuania: about 21 months from filing on average. |
Design US: first office action in about 14 months, about 21 months to a decision. EU: often registered within days to a few weeks |
| Term | Utility patent 20 years from filing, with annual or maintenance fees |
Design US: 15 years from grant, no maintenance fees. EU and Lithuania: 5 years, renewable up to 25 years |
| Typical cost range (official fees) | Utility patent US filing, search, examination and issue: $3,290 large entity, $1,316 small, $658 micro. Then maintenance fees of $2,150, $4,040 and $8,280 (large entity) at 3.5, 7.5 and 11.5 years. Drafting the application is usually the largest cost. Estimate your patent costs |
Design US through grant: $2,600 large entity, $1,040 small, $520 micro. EU: €350 for the first design and €125 for each additional design in the same application; renewals from €150 to €700 (Regulation (EU) 2024/2822). Design registration costs. Lithuania: €138 in VPB fees for up to 10 designs (€69 application + €69 registration). |
| Grace period after your own disclosure | Utility patent US: 12 months. Lithuania: in practice none. EPO: in practice none (EPC Art. 55) |
Design US: 12 months. EU and Lithuania: 12 months (Regulation (EU) 2024/2822) |
| Main risks | Utility patent Slow and costly; nothing can be added after filing, so a thin description means narrow protection |
Design Narrow: a competitor can change the look enough to avoid it, and it never stops a copy of the function |
Official fees as of October 2026 (USPTO fee schedule). Professional fees come on top and depend on the invention and the number of countries.
Which should I file? A five-step decision flow
Work through the questions in order. The first one is about deadlines, because a missed deadline can rule out an option before you compare anything else.
- Have you already shown the product in public? A trade fair, a website, a crowdfunding page, a sale or an investor deck without an NDA all count.
- No → go to step 2. Keep it confidential until you file.
- Yes → note the date and talk to a patent attorney now. You usually have 12 months for a US patent and for a US or EU design. For a European or Lithuanian patent, the disclosure has most likely already destroyed novelty.
- Could a competitor copy the function in a product that looks different?
- Yes → you need a utility patent. Go to step 4.
- No → go to step 3.
- Would a look-alike product take your sales, even if it worked differently inside?
- Yes → file a design patent (US) or a registered design (EU, Lithuania). Go to step 5.
- No → a patent or design may not be the right tool. Consider a trademark for the brand or keeping the know-how as a trade secret.
- Does the appearance also matter to buyers?
- Yes → file both. Ask for drawings in the utility application that also show the product’s appearance: in the US, a later design application can claim the earlier filing date only if those drawings already show the design.
- No → a utility patent alone is enough.
- Will the product be on the market for less than about three years? Think seasonal goods, fashion or limited editions.
- Yes → an EU registered design is fast and cheap. An unregistered EU design also gives 3 years of protection from first disclosure in the EU, but only against deliberate copying.
- No → register the design and plan renewals for as long as the product sells.
Not sure about step 2 or 3? That is the question to bring to a free consultation.
Common mistakes
1. A false sense of protection
A design patent on a product with a new mechanism protects the housing, not the mechanism. A competitor can put your mechanism into a different shape and you cannot stop them. The reverse also happens: a strong utility patent does not stop a look-alike that works in a different way.
Other versions of the same mistake:
- “Patent pending” is not a patent. You cannot enforce anything until the patent is granted. In Lithuania and under the European Patent Convention, a published application gives provisional protection, but you can only use the full rights of a patent owner after grant.
- An unregistered EU design is weak. It lasts 3 years and only stops deliberate copying, which you must prove.
- Patents and designs are territorial. A US patent does not stop a competitor selling in the EU, and the reverse.
2. Missing conversion and priority deadlines
Most lost rights come from a missed date, not a rejected application. The deadlines that cause the most trouble:
| Deadline | Time limit | What happens if you miss it |
|---|---|---|
| US provisional → non-provisional or PCT application | Time limit 12 months from the provisional |
If you miss it You lose the provisional’s filing date |
| Priority for a patent in other countries | Time limit 12 months from the first filing |
If you miss it Anything published in the meantime, including your own product launch, counts against you |
| Priority for a design in other countries | Time limit 6 months from the first filing |
If you miss it Same as above. Many applicants assume 12 months here |
| PCT → national or regional phase | Time limit 30 months from priority (31 at the EPO) |
If you miss it The application lapses in those countries |
| Unregistered EU design → registered design | Time limit 12 months from first disclosure |
If you miss it The design is no longer new and cannot be registered |
3. Weak disclosure
What you file on day one is what you can protect. Nothing new can be added later.
- Utility patents: a description of only one version of the invention invites a competitor to build a slightly different one. Describe alternatives, materials, ranges and variants.
- Design patents and registered designs: the drawings are the protection. Views that do not match lead to rejection in the US. Showing every minor detail in solid lines makes the protection narrower, because a copy without that detail may fall outside it. Use broken lines or disclaimers for parts you do not claim.
- Planning both: if the utility drawings do not show the product’s look, they cannot support a later design filing.
Not sure which protection fits your product?
METIDA’s patent attorneys check whether your product is patentable, compare the routes for your markets and give you a cost estimate before you file. Book a free consultation or try the patenting cost calculator.
Renata Andužienė
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