The particular reasons relied on by the examiner for holding that the inventions as claimed are either independent or distinct should be concisely stated. A mere statement of conclusion is inadequate. The reasons upon which the conclusion is based should be given.
For example, relative to a combination and a subcombination thereof, the examiner should point out the reasons why he or she considers the subcombination to have utility by itself or in other combinations, and why he or she considers that the combination as claimed does not require the particulars of the subcombination as claimed.
Each relationship of claimed inventions should be similarly treated and the reasons for the conclusions of distinctness or independence set forth. Form paragraphs 8.01, 8.02, and 8.14 – 8.20.02 may be used as appropriate to explain why the inventions as claimed are independent or distinct. See MPEP § 806.05 – § 806.06.