Assignment 2 Semester 2 2025
2 2025
Unique Number:
Due date: 18 September 2025
PATENT INFRINGEMENT AND POSSIBLE DEFENCES
In South African law, patents are governed by the Patents Act 57 of 1978. A patent grants
the patentee the exclusive right to exploit an invention, which includes making, using,
exercising, or disposing of the invention without authorisation.1 Infringement occurs when
another party uses a patented process or product without the patentee’s consent.1
In this scenario, Graham’s 2014 patent claims an additive (C) used in a delignification
process. Megan’s process instead makes use of additives A and B, based on her discovery
in a 1990 engineering book. If Megan’s process is materially the same as Graham’s
patented process, differing only in substituting C with A, it may fall within the scope of
infringement under the doctrine of equivalents.1
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