Having just read Mats Lewan's "An Impossible Invention" I would bet on
Rossi knowing what he is doing. He's been through all this a coupe of
times before. In particular, consider what would have happened if he
had described the E-Cat in sufficient detail that others could make a
working version and the Patent Office has turned it down for any
reason. As they have done for the present application. Then others
would have his secrets for free.
I have little confidence in the patent system anyway. The patent is not
worth anything until it has been expensively defended in court. The
patent situation for LENR is in such a mess I expect the lawyers will
make as much as the inventors at least for the first few years.
I view his current patent as just a holding position. If there is to
be a real patent it will probably be for the catalyst/powder treatment
that gives a high output, for the Hot Cat that is significantly
different, and probably for the two stage Mouse and Cat that will
provide a higher COP.