Granted Patent
Utility
US 5,114,532 · App. 07/674,071
Process of etching iron-silicon-aluminum trialloys and etchant solutions used therefor
Inventor:
Wei C. Hsie
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Mar 21, 1991
Inventor
Wei C. Hsie
Assignee (at issue)
Seagate Technology LLC
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.