Yes- within 12 months from the date of first filing of the priority application.
For national phase of PCT application-within 30 months from the earliest priority date.
Note Please note that the priority document has to be submitted within 3 months from the earliest priority date
For PCT applications entering the national phase in the Sri Lanka, a copy of the PCT international publication search and examination reports must be submitted with the application.
Twenty (20) years starting from the Sri Lanka filing date, (in case of PCT, starting from the PCT filing date). The term of protection is non-extendable
If the patent is not exploited within 5 years from the date of grant, it will be subject to compulsory licensing.
Annuity is payable from the 2nd year up to the end of the 20th year.