Nullity of patent

The privileges granted in the following cases are null and void; 1. Where the inventions or discoveries are known to the public in practice or theory, by any technical description published in national or foreign writings or by any other method; 2. Where there is certificate already granted over the same object; 3. Where the inventions or discovery is found prejudicial to the security or public health or is contrary to the laws; 4. Where the title given to the invention fraudulently includes a different object; 5. Where the description given does not indicate all that is necessary for the execution of the invention or true means of the inventor; 6. Where the privilege is obtained in breach of formalities prescribed by law; 7. Where the privilege of refinement or improvement does not consist in the thing which facilitates the work and amplifies its utility but simply in the change of the form or proportion or in mere decorations.