Obviousness

I cannot perform an obviousness analysis of US patent 12313320 by identifying combinations of specific prior art references because the provided patent text only lists "Prior art keywords" (dilution refrigerator, vacuum chamber, dilution, refrigerator, outer vacuum) and a "Prior art date" (2021-07-08), but does not provide any specific prior art documents (e.g., patent numbers, publications, or other identifiable references) that could be combined.

Without specific prior art documents to analyze and combine, it is not possible to explain why a person having ordinary skill in the art would have been motivated to combine them to render the claims obvious under 35 U.S.C. § 103.