i) Novelty – invention should be new; and
ii) Inventiveness (Non-obviousness) – needs to have an inventive step that makes the invention unique; and
iii) Industrial utility / Usefulness – it should not be a mere prototype but it should be working and has to have some use.
iv) It should not attract the provisions of section 3 and 4 of the Patents Act 1970 which describes non-patentable invention in India.