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Forms part of

Paris Convention
Convention establishing World Intellectual Property Organization (WIPO)
Patent Cooperation Treaty (PCT)
Agreement concerning the Trade-Related Aspects of Intellectual Property (TRIPS)

Patents of Invention
Patents of Addition

Absolute novelty

6-month grace period where disclosure was by the applicant at an officially recognised international exhibition or through unauthorised disclosure by a third party.

Formal examination with a state-of-the-art search and substantive examination (the search and substantive examination is rarely conducted in practice).

15 years with a possible 5-year extension period.
Annual maintenance payments.

No use requirement, but failure to work the invention within four years from the filing date may constitute a ground for the grant of a compulsory license.