First to File in Nepal: Why the Patent Belongs to Whoever Files First
Nepal runs on first to file for patents: the first complete application wins. Why publication before filing destroys novelty, and how inventors protect priority.
The invention works. The prototype is tested. The team is planning the launch event, the press release, the exhibition stall — and every one of those plans is a way to lose the patent. Nepal's system rewards the filing, not the inventing.
The first-to-file rule is not a technicality. It reorders every decision an inventor makes after the invention works.
In short
Nepal's patent system runs on first to file: the patent goes to the first applicant who files a complete application at the Department of Industry, and novelty is measured against what is already known — including anything the inventor published first. Publication before filing, at a launch, in a journal or at an exhibition, is prior art against your own application; the 12-month Paris Convention window and the PCT route exist to bridge cross-border filings, not to forgive local disclosure. The protection that works: file before disclosing, keep the lab record that proves the invention's history, and use the priority mechanisms deliberately.
What first to file means in Nepal
The Patent, Design and Trade Mark Act, 2022 BS (1965) grants the patent to the applicant — and where two applications for the same invention meet, the earlier complete filing wins. The system has no grace for the inventor who invented first but filed second: the register rewards the document, not the idea.
Novelty is the gate that makes the rule bite. An invention is examined against what is already known, and 'known' includes published anywhere in the world — journals, products, exhibitions, theses, social media. The inventor's own publication is prior art like any other: the launch that celebrates the invention can be the disclosure that defeats it.
The disclosure events that burn patent novelty
| Event | Risk | The move |
|---|---|---|
| Product launch or press release | Full public disclosure of the invention | File before announcing — the filing takes weeks, the launch takes a date |
| Exhibition or trade fair | Public display of the invention | File first, exhibit second; photograph any disclosure that happened anyway |
| Journal, conference or thesis publication | Printed, dated, permanent prior art | File before submission — and remember theses become public |
| Pitching to investors without NDAs | Disclosure to strangers with no confidentiality | NDA first, or file first — both if the invention matters |
| Showing a manufacturer | Disclosure unless bound by confidentiality | Confidentiality agreement before the drawings leave |
The lab record: the evidence behind the filing
First-to-file decides who wins between rival applicants, but the inventor's own records decide what the application can prove: who invented, when, and how the invention developed. The dated lab notebook — signed, witnessed, consistent — is the document that supports the inventor's account in a dispute, corroborates the priority story, and anchors the technical committee's reading of the specification.
The record's discipline is simple and universally neglected: dated entries, signed, bound pages, witnesses for key experiments, and no gaps around the invention's conception. It costs minutes per entry and decides ownership arguments years later.
The priority mechanisms, used deliberately
File the first application early
The first complete filing anywhere fixes the priority date — the date against which later applications and disclosures are measured. It should be filed before any public step, and it should be as complete as the invention allows: amendments that add new matter during examination cannot cure a specification that was thin on filing day.
Use the Paris window for cross-border filings
A Nepalese application filed within 12 months of the first filing in another Paris Convention country can claim the earlier date. The window is the bridge between a first filing abroad and protection here — and it expires on schedule, with no extension.
Or run the PCT route for the international family
Nepal is a PCT member, so an international application can be brought into the national phase here — the route for inventions whose filing strategy spans several countries. The national entry has its own document set and Nepali translation requirement, planned against the Treaty's time limits.
The examination clock, once the filing lands
The filing starts its own calendar: after formality checks, the Department of Industry constitutes a technical committee to examine the application, and its findings loop back for amendment within the stated periods. Accepted patents publish in the Nepal Gazette, with objections lying within 35 days of publication — a window rivals can use, which is one more reason the first, complete, well-documented filing is the safest position.
The full journey typically runs a year or more. The 7-year term from registration (renewable twice, to a 21-year ceiling) then rewards the applicant who treated the filing date as the invention's real birthday — which, in Nepal's system, is what it is.
Want this handled for your brand?
IP Watch monitors new trademark publications in Nepal and alerts you to potentially conflicting marks — with the context needed to review them.
This article is general information, not legal advice.