When I read Patent, I don't get novality of that specially with CIP, CP applications.
Is it by checking Backward Citations and compare with present claims?
We were trained to start by reading claims, but claims are often hard to decipher. So, here's a few tips that may help you. 1 and 2 are the easiest, while 5 is probably the most authoritative.
Please note, among people working in the patent field, "novelty" and "inventiveness" refer to two distinct things. Roughly speaking "novelty" means what is claimed has not been previously described as a whole. Roughly speaking "inventiveness" means what is claimed was not obvious from the prior art. Many times, claims can pass a novelty test, but fail an inventiveness (obviousness) test.
By the way, I am not a lawyer (IANAL), and this is not legal advice!
We also came up with a way to automatically find relevant USPTO classifications for a provisional application using modern machine learning techniques. One simply needs to enter the query text at http://patentclassifier.com/large_text/ to get the list of potential USPTO classes leading to document. Try it!