Granted Patent
Utility
US 6,342,107 · App. 07/849,791
Phosphate coatings for metal surfaces
Inventors:
Satoshi Miyamoto, Masamichi Nagatani
Patented Case
View Patent ↗
Granted: Jan 29, 2002
Filed: Mar 11, 1992
Inventors
Satoshi Miyamoto
Masamichi Nagatani
Assignee (at issue)
Henkel Limited
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.