Standard Clauses providing sample language for arguing that the sales conditions and purchaser sophistication factor of a DuPont analysis favors the applicant in response to a likelihood of confusion refusal (also known as a Section 2(d) refusal) in a US Patent and Trademark Office (USPTO) trademark office action. Applicant or counsel can use these clauses to draft an office action response, together with clauses and language addressing any other applicable likelihood of confusion arguments in a DuPont analysis and other refusal grounds. These Standard Clauses include integrated notes with important explanations and drafting tips.