This is because (from my understanding) he didn't really claim a nuclear reaction or anything like that. It just appears to claim the structure and steps for performing the reaction. As far as I can tell the examiner just checked to see if anyone had put the components and ingredients together in the same way.
I'm glad that the public has the additional information in the patent and I hope that the patent makes Rossi more willing to share additional information with the public. But if someone didn't believe in Rossi or LENR before there isn't anything here that would really change their minds.
LENR needs either (A) a publicly known and reliably reproducible experiment that shows unambiguous excess heat or (B) an openly available commercial product. Hopefully the patent will move those goals forward.
I've read the observations of the examiner on uspto site.
It seems quite minor, and I've found no experimental results.
there was much more experimental results in a previously discussed e-cat patent (a recent one with dogbone like heater).
to see the exchanges open
check "Application number" and enter number: 13420109
select tab "image file wrapper" and sort by mail room date
maybe you can find more.