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ARTICLE · 14 APRIL 2026

USPTO Announces PIER Pilot Program That May Impact US National Phase Applications

The US Patent & Trademark Office has introduced a new pilot program that fundamentally changes how certain PCT-based patent applications will be examined in the United States. This program creates mandatory response windows and new strategic considerations for applicants entering the US national phase. Patent applicants must now carefully evaluate their filing strategies to avoid potential pitfalls that could affect patent term adjustment or lead to abandonment.

United StatesIntellectual Property

PCT Informed Examination Request Pilot Program

The US Patent & Trademark Office (USPTO) launched a new pilot program for US national phase utility patent applications filed under 35 USC § 371 (“§ 371 applications”) (based on international patent applications filed under the Patent Cooperation Treaty (PCT)). 91 FR 17949 (April 9, 2026). The USPTO expects the PCT Informed Examination Request (PIER) Pilot Program to help reduce backlogs and pendency of US patent applications. For § 371 applications selected for the program, the USPTO will issue a “requirement for information” that will open a 2-month window (extendable by up to an additional 4 months) to submit a signed Form PTO/SB/478. The Form PTO/SB/478 will reference “applicable PCT international work products”. These include:

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