Granted Patent
Utility
US 4,699,674 · App. 06/840,835
Thermal treatment of brazed products for improved corrosion resistance
Inventor:
Walter D. Finnegan
Patented Case
View Patent ↗
Granted: Oct 13, 1987
Filed: Mar 18, 1986
Inventor
Walter D. Finnegan
Assignee (at issue)
Kaiser Aluminum & Chemical Corporation
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.