Guide to Patents and Utility Models in Mexico (2026)

Overview

Mexico ranks 11th globally for total patents granted and is experiencing significant growth in patent activity — IMPI granted a record 972 patents to Mexican nationals in 2025, a 38% increase year over year. For foreign applicants, Mexico offers a well-established prosecution framework, Patent Prosecution Highway (PPH) arrangements with the USPTO and other major offices, and a recently introduced provisional patent application.

This guide covers patent and utility model filing requirements, prosecution, grant, maintenance, and key strategic considerations for foreign applicants. It reflects the legal framework as of April 2026, including the reforms to the Federal Law for the Protection of Industrial Property (LFPPI) published on April 3, 2026.

Patents vs. Utility Models

Patents protect inventions — products, processes, machines, or compositions of matter — that are novel, involve an inventive step, and have industrial applicability. Term: 20 years from the filing date or priority date.

Utility models protect functional improvements to objects, tools, devices, or their components. They require novelty and industrial applicability but not an inventive step. Chemical compositions and industrial processes are excluded. Term: 15 years from the filing date or priority date.

Utility models offer a faster, more affordable path to protection for incremental innovations. They are underutilized by foreign applicants but can be strategically valuable — particularly for mechanical improvements, product modifications, and manufacturing tooling.

Filing Requirements — Patents

The minimum requirements to file a patent application and obtain a filing date are:

• A signed application using IMPI's standard form.
• Technical documentation: background of the invention, description, abstract, claims, and drawings (if applicable), in any language.
• Payment of official filing fees.

If a priority is claimed, a certified copy of the priority document must be filed with the application or within three months of the filing date. IMPI participates in WIPO's Digital Access Service (DAS), so priority documents available through DAS are accepted.

A power of attorney must be provided. Notarization, legalization, and apostille are not required. Foreign applicants must be represented by an attorney with domicile in Mexico.

If the applicant and inventor are different persons, an assignment or confirmatory assignment document is required.

All documents must be filed in Spanish or accompanied by a Spanish translation. IMPI will accept initial filing in any language but will issue an office action requesting a translation within two months.

Filing Requirements — Utility Models

Filing requirements for utility models are substantially the same as for patents, except that substantive examination evaluates novelty and industrial applicability only — not inventive step.

Provisional Patent Applications (New — April 2026)

The April 2026 LFPPI reform introduces provisional patent applications (Article 105 Bis).

A provisional application secures a filing date with minimal documentation requirements. The applicant then has 12 months to file the complete (definitive) application. Key features:

• The filing date of the provisional application is recognized as the priority date for the definitive application.
• Provisional applications are not published by IMPI, preserving confidentiality during the development period.
• The applicant may use the "patent pending" designation during the provisional period.
• If the definitive application is not filed within 12 months, the provisional application expires without effect.

This mechanism is modeled on international practice (particularly the US provisional patent application) and is useful for applicants who need to secure a priority date quickly — before fundraising, product launch, or public disclosure — while continuing to develop the technical documentation.

Priority Claims

A patent application claiming Paris Convention priority must be filed within 12 months of the priority date. A utility model application follows the same 12-month deadline.

PCT National Phase Entry

Mexico is a PCT contracting state. The deadline for entering the national phase in Mexico is 30 months from the priority date.

National phase entry requires: the international application (description, claims, abstract, drawings), a copy of the international publication, a copy of the international search report, a power of attorney, and payment of official fees. A Spanish translation must be filed if the international application is not in Spanish.

Prosecution

After filing, patent applications undergo:

1. Formalities examination. IMPI verifies formal requirements and priority claims.
2. Publication. The application is published in IMPI's Official Gazette 18 months after the filing or priority date. Early publication may be requested for an additional fee.
3. Substantive examination. IMPI evaluates patentability — novelty, inventive step, industrial applicability, and subject-matter eligibility. Examination is initiated automatically with no additional request or fee required. The April 2026 reform limits the maximum examination period to one year from the start of substantive examination, and limits the examiner to a maximum of two office actions.
4. Office action responses. The applicant has two months to respond to an office action (with a two-month automatic extension). The April 2026 reform introduces an extraordinary 15-day grace period for late responses under specific circumstances.
5. Grant. If the application meets all requirements, IMPI issues a patent grant. The applicant must pay the grant fee and the first quinquennium of annuities within two months of receiving the grant notification.

Patent Prosecution Highway (PPH)

IMPI participates in PPH arrangements with the USPTO and other participating offices. If an applicant has at least one allowed claim at the USPTO (or another participating office), it can request accelerated examination at IMPI. This significantly reduces prosecution time and is one of the most effective tools available to foreign applicants seeking coordinated multi-jurisdictional protection.

Software and AI Patents

Computer-implemented inventions are patentable in Mexico when they produce a technical effect beyond the mere operation of software on a computer. Software "as such," mathematical methods, and business methods are excluded from patent protection.

IMPI's examination of software-related applications focuses on whether the claims define a technical solution to a technical problem. AI and machine learning inventions — including trained models, data processing methods, and algorithm-driven systems — may be patentable if the claims are structured to emphasize the technical contribution.

This is an area where claim drafting strategy is critical. Our team has experience navigating IMPI's subject-matter eligibility criteria for software and AI-related applications.

Timeline

Patent applications take an average of 4 years from filing to grant. Utility model applications average approximately 3 years. PPH-accelerated applications can be resolved significantly faster.

The April 2026 reform's one-year maximum examination period is expected to reduce these timelines going forward.

Maintenance — Annuities

Granted patents and utility models require payment of maintenance annuities in five-year periods, calculated from the anniversary of the filing date. A six-month grace period is available with a surcharge. Failure to pay within the ordinary period and grace period results in automatic lapse of the patent.

Foreign patent owners must be represented by a local attorney for annuity payments.

Term Adjustments and Compensatory Certificates

The LFPPI allows patent term adjustments to compensate for unreasonable delays attributable to IMPI during prosecution.

The April 2026 reform introduces compensatory certificates for regulatory delays in the issuance of health registrations (Article 136 Bis), in compliance with Mexico's obligations under the USMCA/T-MEC. The compensatory term cannot exceed five years.

No term adjustment is available for utility models.

Reinstatement of Lapsed Patents

If a patent or utility model lapses due to non-payment of annuities, reinstatement may be requested within six months following the expiration of the grace period. Reinstatement requires payment of all overdue annuities plus surcharges. If reinstatement is not requested within this period, the lapse becomes permanent.

Ownership Claims (New — April 2026)

The reform introduces a procedure for third parties to claim ownership or inventorship of a granted patent (Article 40 Bis). If the claim is upheld, IMPI will order the reissuance of the patent certificate reflecting the change in ownership.

Official Fees

Official filing fees vary depending on the number of pages, the number of priority claims, and entity size. IMPI offers a 50% discount for small entities, universities, and independent inventors. Attorney fees for prosecution and maintenance are quoted separately.