SIERRA LEONE

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Patent

Forms part of

ARIPO
Paris Convention
PCT

ARIPO patents
National patents

Formal examination (Sierra Leone Industrial Property Office)
Search and examination (ARIPO)
International-type search upon request.
Obligation to submit documents cited in corresponding search reports upon request.
Grant

Duration is twenty years from the date of filing.
Annual maintenance.

Within four years of filing or three years from grant (whichever period ends later), failing which patent may become subject to grant of compulsory licence.