The first following U.S. patent is to "the United States Of America as represented by the Secratary of the Navy" for a "contrail generation apparatus" in which "light scattering pigment powder particles" are "dispensed from a jet mill deagglomerator as seperate single particles to produce a powder contrail having maximum visibility or radiation scattering ability for a given weight material".

Read the full text at Rense.com
Throughout the text they use the word "contrail" yet in the Summary
they add that "the term 'contrail' was adopted for convenience in
identifying the visible powder trail of this invention".

 

This next U.S. patent is "assigned to Hughes Aircraft Co. for atmospheric spraying with aluminum oxide for allegedly reducing global warming through...seeding the layer of heat-trapping gases in the atmosphere with particles of materials characterized by wavelength-dependent emissivity".

Read the full text