A prelude to patent claim drafting. Today we pick up from there to discuss in a very basic way what must go into your patent claim.It can be helpful to draft your claims first. This is the format of what your application should follow for filing. Claims for U.S. patents must be specific enough to distinguish the invention from prior art. They must also be clear, logical, and precise. Prepare draft claims for the invention as the first step. The patent agent may want to sketch out draft claims in the disclosure meeting with the inventor.