Patent Filing in Sri Lanka
File your PCT national phase application in Sri Lanka with the National Intellectual Property Office of Sri Lanka (NIPO) through AnalystIP, within 30 months from the priority date. Every requirement below is taken from the WIPO PCT Applicant's Guide and kept up to date by our team.
When is your national phase deadline in Sri Lanka?
Enter the earliest priority date of your PCT application (or the international filing date if there is no priority).
Patent filing in Sri Lanka: key facts
Reinstatement of rights permitted (Rule 49.6); criteria and fee: refer to the Office.
Reduced application fees for students (1,150 LKR) and natural persons (2,875 LKR)
20 years from the international filing date
Official fees for patent filing in Sri Lanka
Filing in several countries? Compare fees with other countries →
Standard official fees (general)
From the WIPO PCT Applicant's Guide, updated June 4, 2026. Amounts in LKR. Your exact fees depend on your application: use the calculator above.
| Fee | Amount | Notes |
|---|---|---|
| Application fee: Others | LKR 6,900 | Natural persons: 2,875; students: 1,150. Subject to 15% VAT |
| Fee for amendment (Annex LK.I) | LKR 1,150 |
Fee reductions: Reduced application fees for students (1,150 LKR) and natural persons (2,875 LKR)
National phase entry requirements
Time limit
30 months from the priority date (Articles 22(1) and 39(1)(a))
Translation
Article 22: description, claims (if amended, both as filed and as amended, with any Article 19 statement), text matter of drawings, abstract. Article 39(1): description, claims, text matter of drawings, abstract; if amended, both as filed and as amended by the annexes to the IPER.
Late entry and reinstatement
Reinstatement of rights permitted (Rule 49.6); criteria and fee: refer to the Office. Office accepts effect of RO restoration of priority and requests for restoration; criteria and fees: refer to the Office
Agent and power of attorney
Required if the applicant is not resident in Sri Lanka; must be a registered patent agent; power of attorney required (model in Annex LK.II)
Special requirements of the office
- Name and address of the inventor if not in the request (Rule 4.17 declaration may satisfy)
- Statement justifying the applicant's right to the patent where the applicant is not the inventor (Rule 4.17 declaration may satisfy)
- Appointment of an agent if the applicant is not resident in Sri Lanka
Other information
- Copy of the international application not required in particular circumstances
- Colour drawings not accepted under national law
- Annual fees (Annex LK.I): 4,600 LKR (1st extension) to 40,250 LKR (14th to 18th); late surcharge 10%; first annual fee due for the third year from grant
- Amendments permitted until grant without broadening scope; fee applies
- Non-residents pay by bank draft payable to the Director General of Intellectual Property
- No provisional protection after international publication
Source: WIPO PCT Applicant's Guide, national chapter, updated June 4, 2026.
Patent filing in Sri Lanka: questions
What is the deadline for PCT national phase entry in Sri Lanka?
30 months from the earliest priority date.
Can I enter the national phase in Sri Lanka after the deadline?
Reinstatement of rights permitted (Rule 49.6); criteria and fee: refer to the Office. Office accepts effect of RO restoration of priority and requests for restoration; criteria and fees: refer to the Office
In which language must the application be filed in Sri Lanka?
English. Article 22: description, claims (if amended, both as filed and as amended, with any Article 19 statement), text matter of drawings, abstract. Article 39(1): description, claims, text matter of drawings, abstract; if amended, both as filed and as amended by the annexes to the IPER.
Do I need a local patent attorney in Sri Lanka?
Required if the applicant is not resident in Sri Lanka; must be a registered patent agent; power of attorney required (model in Annex LK.II)
Are there official fee reductions in Sri Lanka?
Reduced application fees for students (1,150 LKR) and natural persons (2,875 LKR)
How much does patent filing in Sri Lanka cost?
The cost is the official fees of the patent office plus professional fees. The standard official fees from WIPO are listed on this page; the calculator works out the exact official fees for your application (pages, claims, applicant type) after a quick email check, and our team sends a full quote on request.
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