2. Abstract
The abstract must:
(iii)contain a concise summary of the disclosure as contained in the description, the claims and any drawings, which must be so drafted as to allow a clear understanding of the technical problem, the gist of the solution of that problem through the invention and the principal use or uses of the invention and, where applicable, it should contain the chemical formula which, among those contained in the application, best characterises the invention;
(vi)if the application contains drawings, be accompanied by an indication of the figure or exceptionally more than one figure of the drawings which should accompany the abstract. Each main feature mentioned in the abstract and illustrated by a drawing needs to be followed by a reference sign in parenthesis.