Can Post Filing Data Overcome Inventive Step in China?
Since 2010, the Patent Re-examination Board (PRB) has published the top 10 patent invalidation cases of the year in April of each year. The selection criteria are high social concern, significant impact on the related industry, or involve difficult legal issues and important examination criteria. Below is one of the top 10 cases that discusses post filing data in China patents.
Post Filing Data in China
Can post-filing data showing unexpected technical effect be used to overcome inventive step if the specification contains no data but asserts the unexpected technical effect?
In short, the answer is no, post-filing data cannot be used to overcome inventive step even if the idea was asserted if the original data was not in the application.
Novartis’s Chinese patent (201110029600.7) claimed the combination of AT 1-antagonist valsartan and NEP inhibitor Sacubitril. The specification asserted that the combination of the two drugs had synergistic effect, yet provided no data at the time of filing.
The PRB sided with petitioner Dai Jinliang and argued that one of skill in the art could not predict that the combination would be synergistic without experimental data. In other words, applicants had not solved the technical problem of providing a pharmaceutical combination with synergistic effects. At most, applicants had provided a pharmaceutical composition for treating hypertension. In January of 2018, the PRB declared that the Novartis patent was invalid.
In our experience, if experimental data is in the application as filed but another piece of prior art is cited during prosecution, the applicant may submit post-filing data showing results of comparison studies with the newly discovered art, provided that the original data for applicant’s invention was already disclosed in the application as filed.
About the Author
Jennifer Che, J.D. is a US Patent Attorney and Vice President and Partner at Eagle IP, a Boutique Patent Firm with offices in Hong Kong, Shenzhen, and Macau.[email protected]This article is for general informational purposes only and should not be considered legal advice or a legal opinion on a specific set of facts.
Other Articles
China Proposes New Examination Guidelines for Utility Models
24 November 2022
The Utility Model (UM) in China has always been a popular choice for patent filing due to its relatively low cost and speed of prosecution. The UM prosecution only includes a preliminary examination, which is essentially a mini (stripped down) version of an invention application’s substantive examination.1 With the simplified examination process, UMs are typically […]
Read more >
FOLLOW UP: Amendments to the China Patent Examination Guidelines in 2022 – Part 1: New rules for designs in view of China signing onto the Hague Agreement
4 January 2023
Since the publication of our earlier article about China signing onto the Hague Agreement, some of our Hong Kong clients have expressed interest in taking advantage of the Hague international design application system, i.e., filing a Hague international design application with the CNIPA (Chinese National Intellectual Property Administration) as a receiving office (RO). Up until […]
Read more >
CHINA: How Prohibiting "Illegal" Inventions Runs into Food Safety Law
22 October 2021
Chinese Patent Law has an interesting provision that specifically prohibits patent protection on “illegal” or “immoral” inventions. What does this mean, exactly? According to Article 5.1 of the Chinese Patent Law, “no patent shall be granted for an invention that contravenes any law or social moral or that is detrimental to public interests.” On its […]
Read more >
Stealing Trade Secrets: How the Chinese Court Criminally Sentences Employees that Steal Trade Secrets - 2019 China’s Top 50 Representative IP Cases
11 June 2020
The theft of trade secrets has always been a deep concern of foreign companies thinking of doing business in China, whether it be sharing protocols with a manufacturing partner, providing technology details to a potential investor, or sharing results from an R&D collaboration. How can businesses ensure that employees do not steal secrets and share […]
Read more >
Our Past Events
Dr. Jacqueline Lui, Ms. Pauli Wong, and Mr. Eddie Ho Named Patent Stars by ManagingIP
13 June 2025
Eagle IP Ranked Among Top Tier Firms in IAM Patent 1000
12 June 2025
Jennifer Che from Eagle IP to Attend BIO 2025 in Boston!
11 June 2025
Insights from HKSTP Market Discovery - BIO Connect
28 May 2025
HKMHDIA Medical Fair Forum
27 May 2025
Celebrating Innovation at the Asia Summit for Global Health
