Granted Patent
Utility
US 5,452,840 · App. 08/144,103
Water-soluble soldering flux
Inventor:
Raymond L. Turner
Patented Case
View Patent ↗
Granted: Sep 26, 1995
Filed: Oct 27, 1993
Inventor
Raymond L. Turner
Assignee (at issue)
Hughes Aircraft Company
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.