We have recently learnt that, following a change in policy by the Angolan Patent Office, the due dates for the payment of patent annuities are now calculated from the international filing date, rather than from the date of filing the application in Angola. However we have yet to receive formal notification from the Patent Office as to whether any back annuities will be payable on existing cases. We are awaiting the Patent Office's decision in this regard, and we will update this website and notify our clients on their individual Angolan patent cases shortly.