preparation of a receptor layer.
This and the Land patent contain subject matter that would later be important to late 20th century nanotechnology - particularly the concepts surrounding distributions of electrically conducting nanoparticles in various substrates - something that I did extensive work in that can be seen at http://www.ambitcorp.com.
But you really should look at this Drexler patent instead.
Here is a link to that pdf
And here yet is another, much later patent on DTR on google patents here.