C.705 (3) Flow sheets and diagrams shall, for purposes of these Regulations, be considered to be drawings. 8. (1) An abstract forming part of an application for a patent shall be so drafted that it can efficiently serve as a scanning tool for purposes of searching in the particular art. (2) An abstract shall — (a) have a summary of the disclosure as contained in the description, the claim and any drawings indicating the technical field to which the invention pertains; (b) be drafted in a way that merely serves as a source of technical information; and (c) where applicable, contain the chemical formula which, among all the formulae contained in the application, best characterises the invention. (3) An abstract shall be as concise as the disclosure permits, containing not less than 50 but not more than 150 words. (4) An abstract shall not contain statements on the presumed merits or value of the invention or on its speculative application. (5) Each main technical feature mentioned in the abstract and illustrated by a drawing in the application shall be followed by a reference sign, placed between parentheses. 9. (1) In an application for a patent, the following shall be used — (a) units of weights and measures in terms of the metric system; (b) temperatures in degrees celsius; and (c) density in metric units. (2) For indications of heat, energy, light, sound, and magnetism, as well as for mathematical formulae and electrical units, rules in general use shall be observed; and for chemical formulae, the symbols, atomic weights, and molecular formulae, in general use, shall be observed. (3) In general, only such technical terms, signs and symbols as are generally accepted in the art shall be used. (4) The terminology and the signs shall be consistent throughout the application. 10. (1) Three copies, or such number as the Registrar may require, of the application for a patent and any accompanying statements or documents, shall be filed. (2) All elements of an application for a patent shall be so presented so as to enable direct reproduction by photography, electrostatic processes, photo offset and microfilming. (3) Only one side of each sheet contained in an application shall be used. (4) All elements of an application for a patent shall be on paper which is flexible, strong, white, smooth, non-shiny and durable. (5) The size of the sheets shall be A4 (29.7 cm x 21 cm), or such other size as the Registrar may determine. (6) The minimum margins of sheets shall be as follows — (a) upper margin of each page, except the first page: 20 mm; (b) upper margin of the first page: 30 mm; (c) side margin adjacent to the binding: 25 mm; (d) other side margin: 20 mm; and (e) bottom margin: 20 mm. Abstract Measures, terminology and signs Number of copies and physical requirements