Claims - The important part of a patent specification, define the scope of the monopoly sought or granted, in words, are examined by a patent examiner (in each country under different laws), are amended during examination to deal with any issues raised by an examiner, are what a potential infringement is tested against
Newness - An invention is taken to be novel unless it is not novel in the light of the prior art - A citation is part of the prior art base for the purposes of novelty if it was published before the priority date of the claim - Also consider information made available by the doing of an act done before the priority date of the claim
Obviousness - Invention is to be taken to involve an inventive step when compared with the prior art base unless the invention would have been obvious to a person skilled in the relevant art in the light of the common general knowledge as it existed in the patent area before the priority date of the relevant claim, whether that knowledge is considered separately or together with a single piece of prior art information or a combination of any 2 or more pieces of prior art information that could be reasonably expected to be combined - The test is whether the hypothetical addressee faced with the same problem would have taken as a matter of routine whatever steps might have led from the prior art to the invention, whether they be the steps of the inventor or not