Granted Patent
Utility
US 6,074,495 · App. 09/158,141
Method for enhancing the corrosion resistance of chemical conversion coating aluminum
Inventors:
Yuh Sung, Chin-Lung Chang
Patented Case
View Patent ↗
Granted: Jun 13, 2000
Filed: Sep 22, 1998
Inventors
Yuh Sung
Chin-Lung Chang
Assignee (at issue)
CHUNG-SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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.