Patent Maintenance Fees: Keep Your Patent Alive

A patent maintenance fee keeps your Nepal patent active after its first seven-year term. Under the Patent, Design and Trademark Act 1965, the Department of Industry (DoI) allows two further seven-year renewals, giving a maximum patent validity period of 21 years. The typical filing process is handled nationally and requires careful deadline control.

Key Takeaways

Nepal patent renewal follows a fixed statutory cycle rather than annual annuity payments. The Patent, Design and Trademark Act 1965 gives the Department of Industry authority to register, renew and cancel patents when required payments or filings are not completed.

• A Nepal patent is valid for an initial seven-year term.
• You may renew a patent twice, for a maximum total term of 21 years.
• The renewal filing must be made within 35 days of the current term’s expiry.
• A six-month late period may be available after expiry, with an additional government fine.
• Failure to renew within the permitted period can result in cancellation of the patent right.
• The Department of Industry handles patent renewal through Nepal’s national procedure.
• Professional help can reduce errors in dates, documents, ownership details and filing steps.

What is a patent maintenance fee in Nepal?

A patent maintenance fee is the renewal payment and related filing step used to keep a registered patent in force. In Nepal, the payment is made through the Department of Industry for the next statutory term. It is not a payment for a new invention, a new patent application or a trademark. It preserves the rights already granted under the patent certificate.

A patent gives its owner legal control over the protected invention for the permitted term. That control can support licensing, manufacturing, investment and action against unauthorised use. If the renewal is missed, the patent can be cancelled even though the invention was properly registered in the past.

Businesses should treat renewal as a rights-management task, not a routine invoice. Keep the certificate, registration date, ownership records and previous filings together. The exact due date should be checked against the DoI record and certificate before filing.

How long is the patent validity period under the PDTA?

The patent validity period in Nepal is seven years for the first term under the Patent, Design and Trademark Act 1965. The owner may renew it twice for seven years each, creating a maximum PDTA patent term of 21 years. No renewal payment can extend a patent beyond that statutory maximum.

The first seven years run from the patent registration date. The first renewal extends the right for another seven-year period, and the second renewal provides the final additional term. The certificate and DoI record should be used to confirm the relevant anniversary rather than relying on an estimated calendar year.

This finite term differs from trademark protection. A registered trademark may be renewed for further seven-year terms without a fixed maximum, while a patent eventually becomes available for public use after its full statutory term ends.

When must you file a patent renewal in Nepal?

You must file the patent renewal within 35 days of the current term’s expiry under Nepal’s renewal practice. The deadline depends on the patent’s registration date and present term, not the date you commercialised the invention. A six-month late period may follow expiry, but late filing carries an additional government fine.

For example, a patent registered on a particular date reaches its first seven-year expiry on the corresponding anniversary. The first renewal should be prepared for that date and filed within the permitted 35-day period. The second renewal has its own deadline seven years later.

Do not wait for the late period. A late filing creates more risk, adds cost and may require closer review of the patent’s status. If the six-month period also passes without renewal, the patent right may be automatically cancelled.

What happens if you miss the patent maintenance fee deadline?

If you miss the normal renewal window, Nepal allows a limited six-month late period in which renewal may still be possible with an additional fine. If the patent is not renewed within that period, the Department of Industry can cancel the right. Treat a missed deadline as urgent and confirm the available remedy immediately.

Cancellation affects the exclusive legal protection attached to the patent. It can weaken licensing discussions, investment plans and enforcement against copying. It may also leave competitors free to use technology that was previously protected, subject to any other rights that might apply.

Do not assume that a late renewal is automatically accepted. The DoI must receive the correct application, supporting papers and applicable payments. A representative should check the record, term, ownership and filing position before advising on the next step.

How do you renew a patent through the Department of Industry?

You renew a Nepal patent by checking the certificate, preparing the prescribed renewal papers, filing with the Department of Industry and paying the applicable government fee. The DoI checks the submission and records the renewed term. A complete filing made early gives you time to correct document or ownership errors.

1. Confirm the patent record. Review the registration number, owner name, invention title, registration date and current renewal stage. Check whether the patent is in its first term or already renewed once.
2. Calculate the deadline. Identify the current term’s expiry date and the 35-day renewal window. If the normal period has passed, check whether the six-month late period is still open.
3. Prepare the application. Use the prescribed renewal form and gather the patent certificate, ownership information and any authority documents required for the filing.
4. File with the DoI. Submit the renewal application and supporting papers to the Department of Industry through the applicable national procedure. Foreign owners use a Nepal-based agent or representative.
5. Pay the applicable amounts. The total can include the government renewal charge, any late fine and professional fees. Keep the filing proof and payment record.
6. Verify the updated status. Obtain confirmation that the renewal was recorded. Update your internal register with the new term and next expiry date.

Patent renewal is different from the original patent registration process. The original application involves examination of whether the invention is new and useful, publication, a 35-day opposition period and registration. Renewal maintains an existing right; it does not reopen patentability examination in the same way.

Which documents are needed for patent renewal in Nepal?

Patent renewal normally requires the prescribed application, patent registration evidence and a notarised Power of Attorney where a representative files. Foreign applicants may also need certified or notarised foreign filing or registration documents, especially where priority or ownership records must be confirmed. The DoI may require case-specific supporting papers.

• Patent renewal application form.
• Copy of the patent certificate or registration record.
• Notarised Power of Attorney for an authorised agent.
• Specification and claims, where needed to identify the protected patent record.
• Certified or notarised foreign filing receipt or application for a priority-related record.
• Certified or notarised foreign patent registration certificate for a foreign patent owner.
• Ownership, assignment or company documents if the recorded owner has changed.

Keep names consistent across the certificate, application, company documents and Power of Attorney. A mismatch can cause avoidable correspondence. If ownership changed after registration, resolve the record issue before treating renewal as a simple payment exercise.

What does patent renewal cost in Nepal?

Patent renewal cost depends on the renewal term, government charges, late status, document work and professional assistance. The first and second renewal terms may have different official charges. Foreign-owner filings can also involve agent and document costs. For a current figure, use the relevant IP Sewa tools and fee resources or contact the team.

Do not compare a Nepal patent maintenance fee with annual annuities in another country without checking the local rule. Nepal uses seven-year terms and two possible renewals. It is a different schedule from systems that require payments every year after grant.

Who can renew a Nepal patent?

The patent owner or an authorised representative can handle renewal before the Department of Industry. A Nepali company may file through its responsible officer or agent, while a foreign company must use a Nepal-based agent or representative. Nepal has no PCT route for maintaining a national patent and no automatic international renewal system.

Nepal is not part of the Madrid System for trademarks or the Patent Cooperation Treaty for patents. A foreign patent or international filing does not itself maintain protection in Nepal. The Nepal patent record must be renewed through the DoI’s national process.

A Paris Convention priority claim can matter at the original filing stage, but it does not replace renewal of a granted Nepal patent. For a foreign portfolio, identify every Nepal registration separately and check each certificate’s term.

What mistakes cause a patent to lapse?

The most common patent renewal mistakes are using the wrong expiry date, confusing the first and second renewal, waiting until the late period and filing with inconsistent owner details. Another frequent error is treating a foreign annuity calendar as if it governed Nepal. The DoI record and patent certificate should control the review.

• Counting seven years from grant correspondence instead of the registration date.
• Assuming one payment covers several separately registered patents.
• Failing to distinguish an ownership transfer from a routine renewal.
• Sending an incomplete or improperly notarised Power of Attorney.
• Ignoring a change in company name or patent ownership.
• Assuming a foreign PCT filing automatically protects or renews Nepal rights.
• Leaving the filing until the last practical day.

A common mistake we see is storing only the patent title, not the certificate and registration date. Create a record for every patent with the term, renewal stage, owner, agent and filing evidence.

Can a realistic Nepal business example clarify patent renewal?

Imagine “Himalayan ColdBox,” a Kathmandu startup with a registered cooling device patent. Its first term is nearing expiry, so the founder checks the certificate, confirms that no earlier renewal was used, prepares the papers and files the first patent maintenance fee application with the DoI within the permitted window.

The founder does not wait for sales growth or assume that continued use extends the patent. Commercial use does not replace renewal. If the company later transfers the patent to another entity, it should also address the ownership record rather than filing under an unrecorded owner.

If the founder discovers the missed deadline shortly after expiry, the correct response is immediate status checking. The late period may still be available, but it should not be treated as a routine extension. The company must account for the additional fine and any filing corrections.

What alternatives and edge cases should patent owners consider?

Patent renewal is only one part of an invention strategy. A patent owner may also need an assignment record, licence documents, confidentiality controls or industrial-design protection for the product’s appearance. These rights solve different problems and do not substitute for a missed patent renewal or extend the PDTA patent term.

If the invention has a distinctive product name or logo, consider separate trademark protection. A patent protects the claimed technical invention; a registered mark protects the sign that distinguishes goods or services. A product’s shape, pattern or ornament may call for industrial design registration instead.

Public disclosure can also affect future protection. Filing strategy should be considered before demonstrations, sales, investor presentations or online publication. For the wider application process, see the guide to patent application steps in Nepal and the explanation of patent renewal in Nepal.

How can IP Sewa help with a Department of Industry patent renewal?

Our team can help review your patent certificate, identify the renewal stage, prepare the filing and advise on documents for the Department of Industry. We can also help with patent registration and related IP filing work. Send the record through our contact page so a human can assess the case.

For an existing patent, share the registration details, owner information, certificate and any previous renewal proof. If the patent is late, say so at the start. The available route may depend on the exact expiry date, record status and documents.

This article explains general Nepal practice and is not legal advice for a particular patent. DoI procedure can depend on the file. A case review is sensible before expiry, especially for foreign owners, assignments, multiple inventors or a missed deadline.

In short

A patent maintenance fee keeps a Nepal patent active for another seven-year term. The patent begins with seven years, may be renewed twice, and cannot exceed 21 years. File within 35 days of the current expiry where possible. A six-month late period may apply, but cancellation risk rises once that period ends.

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Check your patent record and renewal stage before the deadline, then contact IP Sewa for filing help. You can also review our patent registration and advisory service; if your invention also has a brand name, search existing Nepal trademarks before filing.