Granted Patent
Utility
US 5,137,589 · App. 07/477,491
Method and composition for depositing heavy iron phosphate coatings
Inventor:
Edmund W. Kinkelaar
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Feb 9, 1990
Inventor
Edmund W. Kinkelaar
Assignee (at issue)
Texo 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.