For an Invention to be patentable, it should contain the following:
(i). Novelty:  An invention is considered new & novel it is not predictable owing to prior publication, prior use or prior public knowledge.  
(ii). Inventive Step:  Apart from the invention not being obvious to a person skilled in the art, inventive step would be a feature of an invention that involves either:
•    A technical advancement compared to the existing knowledge
•    Having economic significance or,
•    Both
(iii). Industrial Application:  An invention must be capable of industrial application, which means, the invention should be capable of being made or used in an industry.