SIERRA LEONE
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Patent
Forms part of
- ARIPO
- OAPI
- PARIS CONVENTION
- PCT
- SIERRA LEONE
- ARIPO
- OAPI
ARIPO
Paris Convention
PCT
ARIPO patents
National patents
Absolute
Twelve months
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.