NASA has screwed up bad. They have embraced both the Widom-Larsen (W-L) theory and polaritons in the same framework. They are incompatible.
In the NASA LENR patent as follows: “A method for producing heavy electrons is based on a material system that includes an electrically-conductive material is selected. The material system has a resonant frequency associated therewith for a given operational environment. A structure is formed that includes a non-electrically-conductive material and the material system. The structure incorporates the electrically-conductive material at least at a surface thereof. The geometry of the structure supports propagation of surface plasmon polaritons at a selected frequency that is approximately equal to the resonant frequency of the material system. As a result, heavy electrons are produced at the electrically-conductive material as the surface plasmon polaritons propagate along the structure” The devil is in the details. The mass of the surface plasmon polaritons is in the milliwatt range. Heavy electrons cannot be produced from the population of surface plasmon polaritons because of the mass/energy deficit. This screw up should invalidate the NASA patent. Cheers: Axil

