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Date Published

A patent must not be granted on an application for a patent of addition before the grant of the parent patent for the main invention (sec 81(3)). In practice, examiners must not accept an application for a patent of addition until the parent application has been accepted (see Examination Practice).  Examiners must therefore place a case note on each file to ensure that these provisions are observed. In some circumstances, the grant of the parent may be accelerated (see 2.19.5 Timing Provisions).

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