Interesting metallurgy patent info.
https://www.govinfo.gov/content/pkg/...1a37c149b8.pdf

General Motors has more Patents then I care to read lol!
https://patents.justia.com/company/g...-motors?page=3

A reputable company that deals with US patents I will call and ask some GM questions.
https://www.candcip.com/metallurgy