Granted Patent
Utility
US 5,407,121 · App. 08/155,020
Fluxless soldering of copper
Inventors:
Nicholas G. Koopman, Sundeep Nand Nangalia
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Nov 19, 1993
Inventors
Nicholas G. Koopman
Sundeep Nand Nangalia
Assignee (at issue)
MCNC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.