page 7  Article 14: Any invention claimed in a patent application filed by the employee in the year following the expiration of the employment contract which is part of the main activities of the former employer shall be deemed to have been made within the framework of the contract which has expired, unless the employee provides proof to the contrary. Article 15: The inventor shall be mentioned as such in the patent unless, in a special written statement addressed to the Industrial Property Director, he indicates that he does not wish to be mentioned. Any promise or undertaking made towards anyone by the inventor to the effect of making such a statement shall have no legal effect. Article 16: The provisions of this Chapter shall apply to civil servants, to persons governed by the Labor Code as well as to persons whose services have been hired pursuant to the provisions of the Civil Code. Chapter III: Subject matter excluded from patent protection Article 17: The following shall be excluded from patent protection: - Discoveries, scientific theories and mathematical methods; - Plans, principles or methods in the field of economic activities, in the performance of purely intellectual activities or in games; - Methods of surgical or therapeutic treatment of the human or animal body as well as diagnostic methods. This provision shall not apply to the products used for the implementation of one of these methods; - Natural substances, even if they had been purified, synthesized or isolated in another manner. This provision shall not apply to processes making it possible to isolate these natural substances from their original environment; - Known substances for which a new use has been discovered; - Plants and animals, including parts thereof, other than microorganisms, and essentially biological processes for the breeding of plants and animals and parts thereof, other than non-biological and microbiological processes; - Animal breeds and plant varieties; - Inventions whose exploitation is contrary to public order or morality, it being understood that the exploitation of said invention is not contrary to public order or morality owing to the sole fact that such exploitation is prohibited by legislation; - Pharmaceutical products, up until January 1, 2016. Article 18: The provisions of Article 17 shall not apply: