How Long Does Design Patent Protection Last in the United States?

In the United States, a design patent generally protects an ornamental product design for 15 years from the date the patent is granted. Patents granted on applications filed before May 13, 2015, have a 14-year term instead. The clock starts at grant—not when the application is filed—and design patents do not require maintenance fees. Knowing these details helps businesses and creators estimate when protection ends and plan what to do before and after expiration.

U.S. Design Patent Term at a Glance

The controlling statute is 35 U.S.C. § 173. It sets a 15-year term measured from the date a design patent is granted, subject to the transition rule for earlier applications. The USPTO explains the same distinction in its design patent guidance.

For a particular patent, the safest way to confirm the applicable term is to check its grant date and the filing date of the application that led to it. The grant date alone does not determine whether the term is 14 or 15 years: the May 13, 2015, cutoff concerns the application’s filing date.

When Does the Design Patent Protection Clock Start?

A design patent’s term starts on its grant date, the date the USPTO issues the patent—not on the date the application was filed, the product was designed, or the product first went on sale. For example, if a qualifying application filed in 2020 results in a patent granted in 2023, its 15-year term generally runs from the 2023 grant date.

This timing differs from the general term calculation for many U.S. utility patents, which typically runs from the relevant application filing date. It also means that time spent waiting for a design application to be examined does not ordinarily reduce the 15-year post-grant term established by § 173.

A pending application is not the same as an issued design patent. Filing an application does not, by itself, give the applicant the full enforceable exclusion rights associated with a granted patent. The application may later be rejected, abandoned, or issued with claims narrower than the applicant originally sought. Before grant, public disclosure, sales, and copying can raise separate legal or business concerns, so an applicant should not describe a pending application as an issued patent.

Why Some Design Patents Last 14 Years

Congress changed the U.S. design patent term from 14 years to 15 years as part of the legislation implementing the Hague Agreement’s international design registration system. The change took effect on May 13, 2015. Applications filed on or after that date fall under the 15-year rule; applications filed earlier generally retain the 14-year term.

The transition is based on when the application was filed, not when the design patent was granted. Therefore, a patent granted after May 13, 2015, can still have a 14-year term if it arose from an application filed before that date. Checking the patent’s bibliographic details, including its filing and grant dates, avoids this common source of confusion.

What a Design Patent Protects During Its Term

A U.S. design patent protects a new, original, and ornamental design for an article of manufacture. The protected subject matter can concern an article’s shape, surface ornamentation, or a combination of visual features. A patent’s drawings are central: they show the design claimed, and solid and broken lines can help indicate which features are included in or excluded from the claim.

Design patent protection is not a general right over a product idea, brand name, or function. It does not automatically protect every product that looks broadly similar, nor does it give the owner a patent on the underlying technology. Functional inventions are generally considered under utility patent law, while words and logos may be protected through trademark law. Copyright may apply to some original artwork, but it does not replace a design patent.

Infringement analysis depends on the patented design as a whole and the relevant article of manufacture, not simply on whether two products share one attractive feature. Product context and the patent’s drawings matter. Because the scope can be fact-specific, an owner assessing a suspected copy should have the issued patent and the competing product reviewed by a qualified patent professional.

Do Design Patents Require Maintenance Fees?

No. U.S. design patents do not require periodic maintenance fees to remain in force. This is an important difference from utility patents, for which maintenance fees are generally due at specified intervals after grant. A design patent does not expire early merely because its owner failed to pay a maintenance fee that does not apply to that patent type.

That does not mean every design patent necessarily remains enforceable for its full stated term. A patent may be affected by a court ruling, a disclaimer, an ownership or licensing dispute, or other legal circumstances. A particular patent’s status should be checked in official USPTO records rather than inferred solely from the absence of a maintenance-fee payment.

What Happens When a Design Patent Expires?

When the term ends, the patent’s exclusionary rights generally end as well. The former owner can no longer use that expired design patent to stop others from making, using, selling, offering to sell, or importing products that would have infringed it while it was in force. The design covered by the expired patent is generally available for public use, subject to other rights that may still apply.

Expiration does not erase the possibility of liability for conduct that occurred while the patent was active. A patent owner may pursue a timely claim concerning alleged infringement during the enforceable term, subject to applicable law, defenses, and procedural limits. Patent damages are governed in part by 35 U.S.C. § 284. For design patents, 35 U.S.C. § 289 also addresses an infringer’s profits from an article of manufacture. The calculation and availability of remedies depend on the facts and law.

Other protections may continue after a design patent expires. A product’s name or logo may remain protected by a trademark, and copyright may protect qualifying artwork or other original expression. A separate utility patent may cover functional features for its own term. These rights have distinct requirements and scopes; expiration of a design patent does not automatically cancel them or extend the expired patent.

Can a Design Patent Term Be Extended?

As a general rule, a U.S. design patent’s 14- or 15-year term is fixed by statute and is not extended simply because examination took a long time, the product remained commercially successful, or the owner would prefer additional protection. Design patent term adjustment or restoration does not generally work like a routine extension available for some other intellectual property situations.

It is also not usually possible to renew an expired design patent by paying a fee. A later application for a design must satisfy the applicable requirements, including novelty and other patentability rules, and public disclosure or earlier commercial activity can affect those issues. A later patent, if available, would protect only its own valid claims and would not revive the original patent’s expired term.

How to Find a Design Patent’s Expiration Date

1. Locate the patent number. Use the number printed on the patent document or search the USPTO’s patent resources.
2. Confirm the application filing date. This determines whether the 14-year or 15-year term rule generally applies.
3. Find the grant date. The term is measured from issuance, not application filing.
4. Apply the correct term. Add 14 years for an application filed before May 13, 2015, or 15 years for an application filed on or after that date.
5. Check the record for complications. Verify the patent’s current status and review any relevant legal events rather than relying only on a calculated date.

The USPTO Patent Center provides access to patent application and file-history information. The USPTO Patent Public Search can help locate published patent documents. These tools can help identify dates and records, but a complicated ownership, enforcement, or expiration question may require professional advice.

Design Patent Protection Compared With Other U.S. Rights

These protections can overlap, but none is interchangeable with another. A distinctive product appearance might be the subject of a design patent, while a logo on the product may function as a trademark. A technical mechanism may be addressed by a utility patent. The exact protection available depends on what the feature is, how it is used, and whether legal requirements are met.

Practical Planning Before a Design Patent Expires

Businesses can use the term to plan product launches, licensing agreements, redesigns, and portfolio reviews. The expiration date should be recorded alongside the patent’s filing date, grant date, owner, and the specific products or versions associated with its drawings. Companies with international sales should also check foreign rights separately: a U.S. patent protects only within the United States, and other countries may have different terms, filing rules, and status records.

Before expiration, an owner may evaluate whether other patents or intellectual property rights cover distinct parts of a product. Any new filing should be assessed carefully because a known design, prior publication, or earlier sale may affect patentability. After expiration, companies considering a similar product should still review trademarks, copyrights, active patents, and any other relevant restrictions instead of assuming that every aspect of the product is free to use.

Bottom line: Most modern U.S. design patents last 15 years from grant, while patents based on applications filed before May 13, 2015, generally last 14 years from grant. There are no design patent maintenance fees, but the patent’s exact status and any separate rights should be checked before making legal or commercial decisions.