Claims and the description behind them
The claims set the legal boundary of the patent, and the specification has to describe the invention well enough to support those claims and to let someone skilled in the field make and use it. A claim broader than the description supports is vulnerable later. Drafting usually includes a range of claims, from broad to narrow, so that if the broadest claim falls to prior art the narrower ones may still cover the commercial product. Describing alternatives and variations gives room to amend during examination, since new matter cannot be added once the application is filed.
What the drafter needs from you
Good drafting depends on the inventor's detailed account of how the invention works, why it improves on what came before, and what variations are possible. Drawings, prototypes, test data, and code all help. Tell the drafter about competitors' products and the workarounds you expect others to try, because claims written with those in mind are harder to design around. Share the earlier references you know of, since applicants and those representing them owe the USPTO a duty to disclose information material to patentability.
Provisional drafts and who prepares them
A provisional application filed quickly can hold a date, but it supports later claims only to the extent it actually describes the invention, so a thin provisional may protect less than it seems. Preparing and prosecuting patent applications for others before the USPTO is limited to registered patent attorneys and agents, so ask about registration when choosing who drafts yours. At the start we talk about the timeline, which markets matter, how the claims will map to the product, and how much technical detail you can provide.
