1. Introduction
The integration of patents into technical standards has become a critical driver for innovation and industrial competitiveness. In China, the number of patent applications related to standards—particularly in telecommunications—has been steadily increasing. To help applicants navigate the complex interplay between patent prosecution and standard-setting processes, the China National Intellectual Property Administration (CNIPA) has issued the Guidelines for Invention Patent Applications Involving Standards. This article summarizes key filing strategies drawn from the Guidelines, focusing on timing, procedural tools, and coordination with standard-setting timelines.
2. Leveraging the Priority Right for Early Patent Placement
The priority right is a fundamental tool for securing an early filing date while allowing flexibility to adapt to standard evolution. Standard-setting procedures typically span several years, from initial proposal to final standard freeze. The final technical solution adopted in the standard may differ significantly from the initial proposal. Under Article 29 of China's Patent Law, applicants may claim priority from a first-filed application within 12 months, allowing later applications to benefit from the earlier filing date while incorporating improvements developed during standardization. The strategic approach involves filing a first application before the relevant SSO meeting, then using the priority year to monitor standardization discussions and amend the application accordingly.
A case example from the Guidelines illustrates this strategy effectively. Company C filed a first application in October 2002 related to an IEEE standard. During the priority year, it monitored the standardization process and filed a subsequent application claiming priority in October 2003. The patent was granted after the standard was published in 2009, with claims aligned to the final standard. This approach secured an early effective filing date while maintaining flexibility to adapt to the standard's evolution over seven years.
3. Using the Grace Period for Novelty as a Safety Net
The novelty grace period serves as a remedial measure when disclosure occurs before filing, but it should not replace early filing strategies. In exceptional cases, applicants may disclose inventions during SSO meetings before filing patent applications. The amended Implementing Regulations of the Patent Law (effective 2024) have expanded the grace period to cover disclosures at international conferences recognized by competent Chinese authorities. Article 24 provides a six-month grace period for qualifying disclosures, including those at international exhibitions or specified academic conferences.
Applicants must follow strict procedural requirements to benefit from this provision. They must declare the grace period at filing and submit supporting documents within two months. This option proves particularly useful when technical solutions are proposed and refined during meetings and cannot be pre-filed. However, it remains a backup measure rather than a primary strategy.
4. Requesting Deferred Examination to Align with Standardization Timelines
Deferred examination allows applicants to synchronize patent prosecution with lengthy standardization processes. Standardization typically takes three to four years or more. Under Article 35, applicants must request substantive examination within three years from the filing or priority date. To avoid premature examination before standard finalization, applicants may request deferred examination together with the substantive examination request, choosing deferment periods of one, two, or three years.
A practical example demonstrates the value of this mechanism. Company E filed a priority application in April 2024 and a subsequent application in March 2025. Anticipating that the relevant 6G standard would not be finalized until 2029, it requested a two-year deferment of examination. This strategic delay allowed it to align its claims with the final standard before examination commenced, maximizing the chances of obtaining standard-essential patent status.
5. Coordinating Patent Prosecution with Standardization Phases
A three-phase strategy aligned with standard-setting stages optimizes the chances of securing standard-essential patents. During the initial proposal phase, applicants should conduct technology foresight and file initial patent applications based on proposed concepts, even before detailed technical discussions begin. In the intermediate phase involving drafting and review, applicants should monitor discussions, refine existing applications, file new ones to cover emerging technical details, and adjust claims to match draft versions. In the final phase after standard approval, applicants should amend pending claims to mirror the published standard.
The 5G RedCap case study from Company A illustrates this phased approach. In June 2019, Company A proposed the RedCap concept at a 3GPP meeting with minimal technical details, then filed a patent application in August 2019 detailing multiple embodiments. As the standard evolved during 2020 and 2021, Company A filed additional applications and amended claims to track the developing specification. After 3GPP Release 17 was frozen in June 2022, Company A amended its pending claims to align with the final standard, resulting in several granted standard-essential patents.
6. Conclusion
Successful filing of standard-essential patent applications requires proactive and coordinated strategies. By leveraging priority rights, the novelty grace period, and deferred examination, applicants can navigate lengthy and uncertain standardization processes while securing robust patent protection. Close monitoring of SSO meetings and timely amendments remain essential to maximizing the chances of obtaining patents truly essential to final standards.
Source: Guidelines for Invention Patent Applications Involving Standards, China National Intellectual Property Administration (CNIPA).
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