(1) The application must include an abstract, which may be filed subsequently up until the expiry of a period of 15 months from the date of filing or, insofar as an earlier date is claimed to govern the application, up until the expiry of a period of 15 months from that date.
(2) The abstract serves the purpose of technical information only. It must contain:
1. the title of the invention;
2. a concise summary of the disclosure as contained in the application which is, as a rule, to indicate the technical field to which the invention pertains and to be drafted in a manner allowing a clear understanding of the technical problem, its solution and the principal use of the invention;
3. any drawing mentioned in the concise summary; where several drawings are mentioned, the drawing which, in the applicant’s opinion, most clearly characterises the invention is to be enclosed.
Where several drawings are mentioned in the concise summary and it is not clear which drawing, in the applicant’s opinion, most clearly characterises the invention, the examining section determines that drawing which most clearly characterises the invention.