Christian Steenstrup, Patent on double evaporator. Jan 1, 2021 16:27:48 GMT ckfan and turbokinetic like this Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by coldspaces on Jan 1, 2021 16:27:48 GMT I don't recall seeing this before, but we might have. I haven't read it all but looks interesting. patents.google.com/patent/US1992018A/en?q=general+electric&q=enameling+evaportors&before=priority:19340101&after=priority:19280101