IP analysis: This case concerned the alleged infringement of two patents relating to the shape and composition of a disposable washbowl made of moulded paper pulp. The first patent was held to be valid but not infringed. Notably, in relation to the doctrine of equivalents, the judge applied the Formstein defence, a defence which has been subject to obiter discussions in previous patent cases but until now had never been directly applied on the question of infringement by equivalents in England. For the second patent, the judge found that the patent was valid (and infringed), as it was not obvious over the two cited pieces of prior art. This decision flowed from the judge’s assessment of the identity of the skilled person and their common general knowledge. Also, of interest in relation to the second patent were the judge’s comments on long felt want and commercial success which highlight the difficulties of relying on these arguments in support of inventiveness, and serve as a good reminder on the importance of adducing properly substantiated evidence. Written by Tanvi Shah, Bryan Poon and Meredith Hughes from Baker & McKenzie LLP.