An event occurs when information about a technical solution is made available to the public before a patent application is officially filed with the authorities. This prior public disclosure acts as a bar to patentability because it destroys the novelty of the invention under the standards of the People’s Republic of China. The disclosure can take many forms, including the publication of an academic paper, the presentation of a product at a trade fair, or the sale of an item in the open market.
It does not matter if the information was shared intentionally by the inventor or accidentally by a third party, as the law focuses on whether the knowledge was accessible to the public. If the technical features of a claim are found in a prior disclosure, the patent application will be rejected or the granted patent will be invalidated. This rule prevents the conversion of public knowledge into private property and ensures that patents are only awarded for truly new contributions.
It forces inventors to maintain strict confidentiality and to file their applications before engaging in any commercial or promotional activities.
Information is considered part of the state of the art if it was reachable by an interested person anywhere in the world through any medium. For the purposes of prior public disclosure, the geographic location of the event is irrelevant as long as the information was technically available. A manual published in a foreign language in a remote library or a post on an obscure internet forum can both serve as evidence of a prior disclosure.
The key test is whether a member of the public had the possibility of accessing the information without a duty of confidentiality. This global standard reflects the interconnected nature of modern science and industry where knowledge travels rapidly across borders. Examiners at the patent office use advanced digital search tools to locate such disclosures during the substantive examination of an application.
They look for any record that predates the priority date of the patent, including digital timestamps and publication dates. This high bar for secrecy means that companies must be extremely careful when collaborating with external partners or conducting field trials. Even a small-scale demonstration without a non-disclosure agreement can be enough to block a future patent right.
Exceptions to the novelty-destroying effect of an early disclosure are limited to specific circumstances defined in the national patent law. An inventor may still be able to file for a patent despite a prior public disclosure if the event occurred within six months of the filing date and falls into one of three categories. These categories consist of disclosures at an international exhibition sponsored or recognized by the Chinese government, disclosures at a prescribed academic or technical conference, and disclosures made by a third party without the inventor’s consent.
To take advantage of this grace period, the applicant must make a declaration at the time of filing and provide supporting evidence within a strict timeframe. If these conditions are met, the earlier disclosure is not used as prior art against the application. This provision provides a small safety net for researchers and exhibitors, but it is much narrower than the grace periods found in other jurisdictions such as the United States.
It does not cover general commercial sales or promotional videos posted by the company itself. Because of these limitations, the grace period is rarely used and most businesses rely on a “file-first” strategy to avoid any risk to their intellectual property.
Discovery of an earlier revelation of the technical claims can lead to the total revocation of a patent during an invalidation challenge. When a competitor finds evidence of a prior public disclosure that the patent office missed, they can use it as a ground for an invalidation petition. This evidence often consists of dated catalogs, shipping records, or old versions of a company website that show the invention was already in use.
The petitioner must prove that the disclosure was public and that it contained all the essential elements of the patented invention. If the evidence is accepted, the patent is declared invalid from the date of grant, which can be a catastrophic loss for a company that has invested in enforcement. This possibility creates a permanent shadow over patents that were filed after a product launch or a public announcement.
It also provides a powerful defense for companies accused of infringement, as they can search the historical record to find evidence that the plaintiff’s right is legally void. The finality of this novelty test reinforces the importance of integrated research and intellectual property management. Companies must coordinate their marketing and engineering departments to ensure that no public statement is made until the patent filing is secured.
Post 100 percent cash counter-bonds under GACC Article 23 to clear detained exit containers within 20 days while filing CNIPA evaluation reports to invalidate squatted tier-two utility models.
Expertise is a utility, not a secret. sentiention™ publishes its working knowledge as open reference: intelligence layer covering the materials it sources, the markets it enters, and the reference that serves both.