When an invention or utility model was substantively developed in mainland China, filing first in the United States or another country may require a China foreign-filing secrecy review before the overseas application is submitted. The trigger is where the substantive technical solution was completed, not the inventor’s passport or the applicant’s place of incorporation.

This matters for U.S. companies that use China-based engineers, joint R&D teams, contract manufacturers, laboratories or product-development subsidiaries. A filing calendar should identify the place of invention before choosing a first-filing office. This guide explains the current rule and a practical coordination workflow; it is general information, not a conclusion about a particular invention or export-control issue. Official sources were checked on September 23, 2026.

Direct answer: check the place of invention before choosing the first filing office

Article 19 of China’s Patent Law requires any entity or individual to obtain a confidentiality examination from the China National Intellectual Property Administration before filing abroad for an invention or utility model completed in China. Under Rule 8 of the Implementing Regulations, the relevant question is whether the substantive content of the technical solution was completed within mainland China.

The rule is not limited to Chinese citizens or Chinese-owned companies. CNIPA’s public guidance specifically says that a foreign inventor who completes an invention in mainland China is within the process, while a Chinese inventor who completes the invention outside mainland China is not within it. Nationality is therefore an unreliable shortcut. The team needs facts about who made the inventive contribution, what each person contributed, and where that work occurred.

What triggers the China confidentiality examination

The statutory trigger combines three elements:

  • the subject is an invention or utility model, rather than an industrial design;

  • the substantive content of the technical solution was completed in mainland China; and

  • the applicant plans to file a patent application abroad or submit an international patent application to a foreign receiving office.

“Substantive content” calls for a fact-specific review. The location of routine testing, translation, document formatting or management approval may not answer the question. More useful records include invention disclosures, laboratory notebooks, design histories, source-control logs, meeting notes and contributor interviews showing where the claimed technical features were conceived and developed. For a distributed team, a mixed-location record may require coordinated advice rather than a one-line location label.

This confidentiality examination is a patent-filing requirement. It should also be separated from technology export controls, state-secrets rules, employment obligations and contractual confidentiality restrictions. Passing one review does not automatically satisfy the others.

Three filing routes and how the request fits

The current Implementing Regulations describe three common routes.

  1. Direct foreign filing. Before filing abroad, the requester submits a confidentiality-examination request to CNIPA and provides a detailed description of the technical solution. CNIPA’s service page states that a direct request uses the prescribed request form and a Chinese-language technical-solution description; an agency authorization is also needed when an agent is appointed.

  2. China application first. A request may accompany the Chinese patent application or be filed afterward, but it must be made before the foreign or international application is submitted. When the request accompanies the China application, CNIPA reviews the filing documents rather than requiring a separate technical-solution description.

  3. PCT application filed with CNIPA. A qualifying international application submitted to CNIPA is deemed to include the confidentiality-examination request. This should not be confused with filing a PCT application through another receiving office.

The best route depends on the commercial filing plan, priority strategy, ownership, drafting readiness and where later applications will be filed. A confidentiality request does not replace the separate work of choosing applicants, identifying inventors, confirming assignments, claiming priority or preparing a disclosure that supports the intended claims.

Current timing under the 2023 Implementing Regulations

The revised Implementing Regulations took effect on January 20, 2024. Rule 9 provides the current timing framework. If CNIPA considers that the invention or utility model may involve national security or a major national interest and requires confidentiality, it should issue a confidentiality-examination notice within two months after the request; a complex case may receive a two-month extension. When further examination is notified, CNIPA should issue its confidentiality decision within four months after the request; a complex case may receive a two-month extension.

These periods should be built into the first-filing calendar. Do not rely on an old checklist that describes the former four-month and six-month deemed-clearance language. The current text sets notice and decision periods differently. The filing team should confirm the operative notice or decision with China counsel before releasing the application to a foreign office, especially when a launch, conference, investor disclosure or U.S. provisional deadline is approaching.

CNIPA’s service guidance says there is no accelerated procedure and recommends planning well in advance. The service itself is listed as having no official charge, but that does not address professional drafting, translation or agency fees.

Industrial designs are treated differently

CNIPA’s confidentiality-examination service guidance says the request applies to invention and utility-model applications, and that an industrial design application does not require this particular pre-filing confidentiality request. That distinction does not turn a product’s technical solution into a design matter. One product may contain both a protectable appearance and a technical invention, so each intended filing should be classified separately.

Other laws or contractual restrictions may still affect the transfer or disclosure of design materials. Teams should therefore document why the planned subject is an industrial design and separately review any non-patent restrictions that apply to the project.

A practical workflow for U.S.–China R&D teams

Use a filing gate before any overseas application leaves the company or its foreign counsel:

  1. Freeze the candidate disclosure. Identify the version of the invention disclosure that will support the first filing. Avoid sending a moving collection of partial drafts to different offices.

  2. Map inventive contributions. Record the claimed technical features, contributors and locations where those features were conceived or materially developed. Do not use payroll location alone.

  3. Separate filing subjects. Distinguish inventions, utility models and industrial designs, and identify whether multiple applications describe the same substantive technical content.

  4. Choose the filing route. Decide whether to request review directly, file in China first, or submit a PCT application through CNIPA. Coordinate priority and applicant ownership at the same time.

  5. Prepare consistent content. For a direct request, the Chinese technical-solution description should match the content intended for foreign filing. For a request tied to a China application, confirm that the filed disclosure covers the foreign claims being planned.

  6. Track the official response. Preserve the request, filing receipt, notices and decision in the global docket. Do not treat an internal email or a foreign filing license from another country as the China record.

  7. Release foreign filing only after review. Use a documented instruction from responsible China counsel or the applicable official result before transmitting the application to the foreign office.

For related timing controls, see our guide to public disclosure before a China patent filing and the PCT China national-phase handoff checklist.

Common mistakes to prevent

The most serious mistake is filing abroad first and asking for China confidentiality review later. CNIPA’s public guidance states that there is no remedial procedure for a request omitted before the foreign filing. Patent Law Article 19 also states that a China patent will not be granted for an invention or utility model filed abroad in violation of the requirement.

Other recurring errors include assuming that a U.S. parent company is outside the rule, looking only at the named inventors’ nationality, treating a foreign filing license issued by another country as sufficient for China, using different technical content in the request and the foreign filing, and overlooking work performed by China-based contractors. Filing a Chinese application does not by itself finish the process if no confidentiality request is made before the later foreign filing.

The safest operational response is a docket control: no foreign filing instruction for a China-connected project until the place-of-invention review and China confidentiality status are recorded.

Frequently asked questions

Does the rule apply when the applicant is a U.S. company?

Yes, it can. The Patent Law applies to any entity or individual taking a China-completed invention or utility model abroad. Applicant nationality and corporate ownership do not replace the location analysis.

Is the inventor’s citizenship decisive?

No. CNIPA’s guidance focuses on where the invention was completed. A foreign inventor working in mainland China can trigger the process; a Chinese inventor completing the invention outside mainland China does not trigger it solely because of citizenship.

Can we file a U.S. provisional application first and request review later?

Not when the substantive technical content was completed in mainland China and the U.S. provisional is the foreign filing. The request must precede the foreign filing. Because late review is not presented as a cure, assess the facts before transmitting the provisional application.

Does a PCT application automatically satisfy the requirement?

Only a qualifying PCT filing submitted to CNIPA is deemed to include the request under Rule 8. Do not assume the same result when using another receiving office.

Can the direct-request documents be filed only in English?

CNIPA’s service guidance says the request form and technical-solution description for a direct request must be in Chinese, although corresponding foreign-language text may also be provided for reference.

What to send counsel before the filing decision

Begin with a non-confidential project summary, target jurisdictions, intended first-filing date, public-disclosure calendar, applicant entities, contributor list and the countries or regions where each contributor performed the inventive work. Ask counsel what secure channel, conflict check and confidentiality terms should be completed before providing a full unpublished invention disclosure.

The handoff should also identify any earlier applications, related product versions, planned invention and utility-model pairing, and the office intended to receive a PCT application. Our China invention patent and utility-model guide explains the separate choice between those two China rights. For a scoped review, visit our China patent services page and provide your budget and expected filing date without sending confidential technical details through an unsecured first-contact form.

Official sources

This article provides general information and does not constitute legal advice. Filing strategy and compliance should be assessed on the actual development record and intended applications.