Administered by CNIPA under the 2023 Revised Implementing Regulations of the Patent
Law (Rule 36 & Rule 128) which took effect on Jan 20, 2024, the priority restoration
mechanism is a brand-new procedural remedy exclusively available for invention and utility
model patents. Two fatal compliance pitfalls plague overseas PCT applicants: the strict 2-month
absolute restoration deadline after 12-month priority expiry and non-recognition of
overseas bureau priority recovery decisions for China national phase entry. Many European
semiconductor firms lose worldwide novelty protection entirely due to misalignment
between foreign PCT procedures and China’s domestic priority rules. This case analyzes
a German chip developer’s abandoned invention patent caused by failed priority
restoration, clarifies CNIPA’s official examination benchmarks, and delivers cross-border PCT
operational guidance.
A German semiconductor enterprise filed a US provisional application as priority basis in March
2023, then submitted a PCT international application 13 months later, exceeding the 12-month
Paris Convention priority window. The USPTO approved priority restoration under unintentional
error standards in international phase. When entering China’s national phase in May 2024, the
overseas IP team relied solely on WIPO’s restoration ruling without filing an independent CNIPA
priority restoration request within the statutory 2-month period after priority expiration. Two
irreversible procedural defects emerged: First, CNIPA does not recognize priority recovery
decisions issued by foreign receiving offices; domestic restoration applications must be
separately submitted with complete certified foreign priority documents. Second, the applicant
missed the 2-month restoration hard deadline after the 12-month priority term lapsed, and the
technical solution lost early filing date protection, exposing the invention to multiple intervening
prior art published between the US priority date and China’s national phase filing date. CNIPA
rejected all priority claims, and the core chip invention was partially invalidated in subsequent
invalidation proceedings. The German group spent over 156,000 RMB on supplementary searches
and re-filing, losing 18 months of domestic market exclusive lead.
Two-month restoration time limit after 12-month priority expiration (Rule 36). For inventions and
utility models only, applicants may file a priority restoration request within two full months upon the
expiry of the 12-month Paris Convention period, provided the later Chinese application has not entered
official publication preparation. Design patents are completely excluded from this restoration system
with zero remedial channels for overdue priority. No equitable extensions are allowed for attorney
oversight, cross-border mail delays or overseas bureau approval gaps.
Foreign PCT priority recovery has no binding force on CNIPA national phase review. Even if WIPO
or USPTO/EPO approves priority restoration in international stage, overseas applicants still need to
launch standalone restoration procedures before CNIPA, submit a formal restoration petition, pay the
restoration official fee (1,000 RMB), and attach consular-authenticated certified Simplified Chinese
translations of foreign priority certificates. Single reliance on WIPO restoration notices leads to
automatic denial of priority rights.
Clear scope of admissible justifiable reasons for restoration. CNIPA only accepts objective accidental
grounds including system breakdown of overseas IP agencies, force majeure such as natural disasters
or pandemic lockdowns, and hospitalisation of core patent attorneys. Pure internal workflow
mismanagement or simple human negligence cannot serve as valid grounds for priority reinstatement.
Mandatory full set of evidentiary materials for restoration filing. The complete dossier includes priority
restoration request form, certified translated foreign priority application copies, formal statement
explaining objective delay causes, supporting proof of the claimed justifiable reason, and full payment
of both priority claim fee and restoration surcharge. Incomplete document sets trigger direct formal
rejection with no supplementary correction grace period.
Independent PCT national phase priority rules under Rule 128. If a PCT international filing falls within
the 2-month restoration window after priority expiry, applicants still need to initiate separate
restoration after entering China’s national phase; CNIPA will not automatically inherit international-
stage priority recovery outcomes.
CNIPA’s 2024 priority restoration regulation (Rule 36) provides critical remedy for overseas PCT
applicants with accidental priority deadline delays, yet its non-recognition of foreign bureau recovery
rulings and rigid 2-month expiry window create irreversible novelty risks for cross-border technical
inventions. This German chip patent invalidation case fully proves sole reliance on WIPO priority restoration
without separate CNIPA filing results in total loss of early priority date protection. For overseas tech
enterprises launching global PCT layouts, independent tracking of China’s two-month restoration
deadline and separate domestic restoration submission are mandatory safeguards to retain full worldwide
novelty protection.
Hyperlink List：
● CNIPA Official Priority Restoration Guidance (Chinese PDF):
https://www.cnipa.gov.cn/module/download/down.jsp?i_ID=194339&colID=66
● WIPO Lex Full English 2020 China Patent Law Text:
https://wipo.int/wipolex/en/text/585084
● AIPPI English Introduction to CNIPA Priority Restoration Rules:
https://www.aippi.org/news/introduction-of-guidance-on-restoration-of-priority/
