Regulation 11—Abstract.(1)  An abstract shall commence with the title of the invention.(2)  An abstract shall contain a concise summary of the matter contained in the description of the invention which shall indicate the technical field to which the invention belongs, and be drafted in a way which allows a clear understanding of the technical problem to which the invention relates, the gist of the solution to that problem through the invention and the principle use or uses of the invention.(3)  Where appropriate, the abstract shall also contain the chemical formula which, among those contained in the specification, best characterizes the invention and shall not contain statements on the alleged merits or value of the invention or on its speculative application.(4)  An abstract shall normally not contain more than 150 words.(5)  Where the description of the invention contains any drawings, the applicant shall indicate on Form No. 2 in the Second Schedule the figure or exceptionally, the figures of the drawings which he suggests should accompany the abstract when published.  The Registrar may decide to publish one or more other figures if he considers that they best characterize the invention.(6)  An abstract shall be so drafted that it constitutes an efficient instrument for the purposes of searching in a particular technical field, in particular by making it possible to assess whether there is a need to consult the description of the invention itself.