International Patent Filing Deadlines in Nepal Guide

International Patent Filing Deadlines You Cannot Ignore

15 Aug, 2026
Updated 11 Oct, 2026
Patents & Designs
IP Sewa Admin
10 min read

For patent protection in Nepal, the key international patent filing deadline is usually 12 months from your first foreign filing if you claim Paris Convention priority. Nepal is outside the PCT, so you must file directly at the Department of Industry (DoI) under the Patent, Design and Trademark Act 1965 (PDTA).

Key Takeaways

Nepal requires a direct national patent application at the DoI because it is not a PCT member. A Paris Convention patent priority claim generally needs filing within 12 months of the first regular foreign application, while the Nepal patent process includes examination, publication, a 35-day opposition period, and registration.

Nepal is not part of the Patent Cooperation Treaty (PCT), so a PCT national-phase filing cannot enter Nepal.
A Paris Convention priority claim for a patent normally depends on filing in Nepal within 12 months of the first foreign filing.
Your Nepal application must be filed with the Department of Industry, not through an international patent office.
Foreign applicants need a Nepal-based agent or representative and properly prepared supporting documents.
The DoI examines whether an invention is new and useful before publication and registration.
Patent publication opens a 35-day opposition period for interested parties to object.
A Nepal patent lasts seven years and may be renewed twice for further seven-year terms.

A Paris Convention patent priority claim in Nepal depends on a direct Department of Industry filing within the 12-month priority period.

Why does Nepal have no PCT national-phase deadline?

Nepal has no PCT national-phase deadline because it is not a contracting state of the Patent Cooperation Treaty. The DoI handles patent applications under the PDTA, so a PCT application does not itself reserve rights in Nepal or create a later PCT entry route into the country.

The PCT is a filing system administered by the World Intellectual Property Organization (WIPO). It can simplify multi-country planning where states participate, but it does not replace a Nepal filing. You can confirm the treaty framework through WIPO’s international IP resources, then plan Nepal as a separate national filing.

This is a common issue for overseas founders. Their patent counsel may include India, China, Europe, the United States, and PCT destinations in a portfolio plan, while Nepal is left out. If Nepal is a target manufacturing, sales, licensing, or distribution market, identify it before the priority year runs out.

How does Paris Convention patent priority work in Nepal?

Paris Convention patent priority lets an applicant rely on the filing date of its first regular foreign patent application if the Nepal application is filed within 12 months. The DoI then treats the earlier filing date as the claimed priority date for the same invention, subject to the required documents and examination.

Priority is not an automatic patent grant. It is a date-based right. It helps protect you against relevant disclosures or later competing filings that occur after the first filing but before your Nepal application. The invention claimed in Nepal should match the subject matter supported by the earlier application.

The safe working rule is simple: record the first filing date, count 12 months carefully, and leave time for local document preparation. Do not assume a PCT filing, a foreign grant, a company registration with the Office of the Company Registrar (OCR), or a product launch gives you patent priority Nepal protection.

The PDTA is Nepal’s governing industrial-property statute. For the official legal source, consult the Nepal Law Commission’s legislation resources. A local adviser should review priority papers and claim scope before filing; this article is general information, not legal advice.

How do foreign applicants file a patent in Nepal?

Foreign applicants file a patent directly with the DoI through a Nepal-based agent or representative, then the DoI examines the invention as new and useful. If accepted, the application is published, open to opposition for 35 days, and may proceed to registration and a patent certificate.

Confirm the invention and filing plan. Decide whether Nepal is commercially relevant before public launch, technical publication, investor disclosure, or trade-show display.
Calculate the priority date. Start from the first regular foreign patent filing and identify the final day of the 12-month Paris Convention period.
Prepare the Nepal filing papers. Assemble the application form, specification, claims, Power of Attorney, and foreign filing documents where priority is claimed.
File at the DoI. Your representative submits the direct national patent application to the Department of Industry.
Respond during examination. The DoI assesses whether the invention is new and useful and may require clarification or correction.
Pass publication and opposition. An accepted application is published, and interested persons have 35 days to object.
Complete registration. If no valid objection prevents registration, the DoI registers the patent and issues a certificate.

Foreign patent filing Nepal follows a direct DoI route from priority review and claim drafting through publication and certificate.

Which documents support a foreign patent filing in Nepal?

A foreign patent filing Nepal application needs the prescribed patent application, a notarised Power of Attorney, and a specification with claims. Where priority is claimed, the DoI also requires certified or notarised foreign filing evidence, while foreign patent holders may need their certified registration certificate.

The specification explains the invention. Claims define the legal boundaries of what you seek to protect. Weak claims can leave a product exposed even if the technical description is detailed, so translation and drafting need care.

Patent application form for the DoI.
Notarised Power of Attorney authorising the Nepal representative.
Complete specification and patent claims.
Certified or notarised foreign application or filing receipt for a priority claim.
Certified or notarised foreign patent registration certificate, where applicable.

Do not wait until the final month to request certified papers. A missing certification, inconsistent applicant name, or claims that do not align with the priority filing can complicate the application. Our team can help you prepare a direct Nepal filing through our patent registration service.

How long does patent registration take after filing in Nepal?

Patent registration in Nepal usually depends on DoI examination, publication, and the statutory 35-day opposition period after publication. Straightforward matters can move faster, but technical objections, document issues, or an opposition can extend the process, so your filing deadline and registration timeline should be planned separately.

The priority deadline protects your place in time; it does not mean a certificate arrives in 12 months. Once filed, the DoI examines novelty and usefulness under Sec. 7. If it accepts the application, publication gives the public an opportunity to oppose before registration.

For market planning, keep product disclosure and enforcement planning distinct. A pending application is not the same as a registration certificate. If the invention is central to a licensing deal, manufacturing arrangement, or technology transfer, make the Nepal filing plan part of the commercial timetable from the start.

What do patent filing, opposition, and renewal deadlines mean?

Nepal patents are registered for seven years and may be renewed twice for additional seven-year terms, creating a possible maximum of 21 years. The DoI publication stage allows a 35-day opposition window, while renewal must be handled within the applicable statutory period to avoid loss of registered rights.

Deadline or stage	What it means in Nepal	Practical action
First foreign filing date	Starts the Paris Convention priority clock.	Record it immediately in your patent schedule.
Within 12 months	Period to file directly in Nepal and claim priority.	Prepare the DoI application before the final month.
After publication	Interested persons have 35 days to oppose.	Prepare to address any objection through your representative.
Patent term	Initial seven-year registration, renewable twice.	Track renewal dates from the registration record.

Nepal has no PCT national phase: Paris Convention priority and a direct Department of Industry application are the relevant routes.

What mistakes cause foreign patent applicants to lose time?

Foreign patent applicants commonly lose time by treating Nepal as a later PCT destination, disclosing the invention before filing, or starting document collection too late. The DoI applies the PDTA’s novelty and usefulness test, and a missed Paris Convention patent deadline cannot be repaired simply by filing later.

Confusing PCT Nepal with a PCT national phase. Nepal is not in the PCT system.
Counting from the wrong date. Use the first regular foreign filing date, not a later grant date.
Launching before filing. A public brochure, product demonstration, or technical article can create novelty risks.
Filing incomplete claims. The claims, not a marketing summary, define the requested patent scope.
Ignoring the opposition stage. Publication is public, and an interested person can object within 35 days.
Forgetting renewals. A granted patent still needs renewal action to remain in force.

What does a realistic Nepal patent priority example look like?

Imagine a Pokhara engineering startup that first files a patent application abroad for a low-water tea-processing machine. If it wants Paris Convention patent priority Nepal protection, it should file directly at the DoI within 12 months, before presenting detailed working features at a Nepal trade event.

The startup may already have a foreign filing receipt and a technical specification. Its Nepal representative would review whether the applicant name, inventor details, drawings, specification, and claims remain consistent. The DoI then examines whether the invention is new and useful, rather than simply accepting the foreign filing as a Nepal patent.

If the team misses the priority date, it can still ask about filing directly in Nepal, but it loses the earlier priority claim. Whether a later filing remains viable depends heavily on what has already become public. That is why a patent search and technical review should happen early, not after sales begin. Read our guide to patent searching in Nepal before committing to a filing strategy.

Which alternatives apply if the 12-month deadline has passed?

If the 12-month Paris Convention deadline has passed, a direct Nepal patent application may still be considered, but it receives its actual Nepal filing date and must still meet the PDTA novelty test. Nepal offers no PCT fallback, so the practical question becomes whether earlier disclosures now prevent valid protection.

Sometimes the right answer is not a patent alone. A product’s ornamental appearance may qualify for industrial design registration, while confidential manufacturing know-how may need contractual protection. Those options protect different things and do not restore a missed patent priority date. See the difference between industrial design and patent protection in Nepal.

In short: treat Nepal as a direct-filing jurisdiction. Mark the first foreign filing date, prepare the papers early, file within the Paris Convention period where priority matters, and keep later opposition and renewal dates on the same portfolio calendar.

People also search for

These related Nepal patent guides explain the filing process, patentability, renewal, enforcement, and the difference between patent and design rights under the PDTA.

Before you file, review the patent registration support available from our team and contact IP Sewa for help with priority documents, claims, direct DoI filing, opposition, or renewal planning.

#patent #priority #doi #paris convention #international filing

Frequently asked questions

Nepal is not part of the PCT, so a PCT application does not create a Nepal national-phase deadline. To protect an invention in Nepal, file a direct patent application with the Department of Industry (DoI). If claiming Paris Convention priority, prepare and file within the applicable priority period, usually 12 months from the first patent filing.

Nepal is not a PCT member, so you cannot enter Nepal through the PCT national phase. A PCT filing may support protection in PCT countries but not Nepal itself. File directly with the DoI, using a local representative where needed, and submit priority documents if you rely on an earlier foreign filing.

File before showing, selling, crowdfunding, publishing, or publicly testing the invention whenever possible. Nepal’s Patent, Design and Trademark Act 1965 requires the DoI to examine whether an invention is new and useful. Early disclosure can damage novelty and allow another person to file first. Keep records and seek filing advice before launch.

To claim Paris Convention priority in a Nepal patent application, provide a certified or notarised copy of the earlier foreign application or filing receipt. The DoI may also require a certified foreign patent certificate for a foreign patent. Submit these documents correctly with the national filing; missing evidence can put the priority claim at risk.

After the DoI accepts a patent application, it is published for public information. An interested person has 35 days from publication to object. This is different from the 90-day trademark opposition period. If no valid objection succeeds, the DoI can register the patent and issue a certificate after the required formalities.

An unopposed direct patent filing in Nepal typically takes about 12–14 months from application to certificate. The smoothest cases may finish in 6–8 months, but that is not the normal expectation. Examination, publication, and the 35-day opposition period all affect timing. An overseas filing does not shorten the DoI’s national process.

A Nepal patent is valid for seven years from registration and can be renewed twice for further seven-year terms, up to 21 years in total. Track the expiry date carefully. File the renewal within 35 days of expiry. Missing renewal deadlines can threaten rights, so confirm the current filing position with the DoI or /contact.

Patent filing costs in Nepal depend on the invention, technical drafting, document preparation, translations, priority papers, DoI stages, and any examination response. Government charges and professional work are separate. Do not rely on foreign PCT cost estimates for Nepal. For a case-specific estimate and deadline review, contact IP Sewa at /contact.

Yes. Nepal handles patents and trademarks under the Patent, Design and Trademark Act 1965, but their procedures differ. A published patent can be opposed within 35 days, while a published trademark has a 90-day opposition window. Trademark applications use NICE Classification, one class per application; patents instead depend on a technical specification and claims.

Yes. A foreign company can seek a Nepal patent through a direct application at the DoI. Nepal is outside both the PCT and Madrid systems, so international routes do not automatically protect inventions or brands here. Arrange the Nepal filing early, appoint a local representative if required, and provide notarised priority and patent documents where applicable.