Granted Patent
Utility
US 5,693,153 · App. 08/754,374
Non-chromated surface preparation materials and methods for corrosion protection of aluminum and its alloys
Inventor:
Jordan L. Rosengard
Patented Case
View Patent ↗
Granted: Dec 2, 1997
Filed: Nov 21, 1996
Inventor
Jordan L. Rosengard
Assignee (at issue)
H&E CO., LTD
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.